Mechanical clamppráce
...Vynikající dovednosti v řešení problémů a důraz na detail. Výstupy: Kompletní návrhové výkresy motoru. 3D CAD modely komponent motoru. Technické specifikace a výkonnostní data. Dokumentace pro výrobu a montáž. ------------------------------------------------------------------------------------------------------------------------------------------------------------- We are seeking an experienced mechanical engineer or a team of engineers to design a high-performance four-stroke engine for a model aircraft. The engine must meet the following specifications: Specifications: Engine Type: Four-stroke Displacement: 230cc Configuration: Twin-cylinder, boxer/flat engine Additional ...
I'm seeking a skilled draftsperson with expertise in Autodesk Inventor to create a small-sized CAD design along with recorded video of a bush with internal grooves specifically for lubrication. This design will be optimized to reduce friction, thereby ...for lubrication. This design will be optimized to reduce friction, thereby enhancing its overall performance. 2) 2nd cad part as well recorded video Unfortunately, details regarding the bush's durability weren't disclosed, but proficiency in creating this critical machine part is essential. Ideal candidates should have: - Proficient knowledge of Autodesk Inventor. - Expansive experience in mechanical drafting. - Excellent understanding of part function and performance improvement techniques. - Pragmatic practice wi...
I am in search of a talented 3D animator who can bring my manufacturing machine to life in a technical, yet simplified, animation. Your task will be to create a low-detail model, focusing on basic shapes and forms, rather than getting caught up in the nuts and bolts. Experience in a similar field will be seen favorabl...responsibilities and required skills include: - Creating and animating a 3D model of a manufacturing machine - Maintaining technical authenticity in the animation - Accuracy in representing basic shapes and forms - Proficiency in 3D animation programs - Effective communication skills While a comprehensive understanding of manufacturing machines is not necessary, an illustrative comprehension of mechanical elements would be highly beneficial. Let's bring this m...
...The ideal candidate will be fluent in English and have strong Mandarin skills, as a significant portion of our supplier base is located in China. They will have a strong background in mechanical engineering, sourcing, negotiating contracts, and coordinating logistics. Strong communication skills will be essential to effectively communicate client needs to suppliers and manage the end-to-end procurement process. Qualifications: 1. Proven experience in sourcing, procurement, and account management, ideally within the consumer electronics, manufacturing, or construction industry. 2. Bachelor's degree in Mechanical or Industrial Engineering, Supply Chain Management, or a related field strongly preferred. 3. Fluency in English and strong technical Mandarin abilities are r...
Re-Design and Add to our Product Labels (See Attached Examples). Use Different Golf Cart Pictures And/Or Colors To Differentiate Between The Different Models. Each Label Will measure 5 Inch (127MM) Height x 8 Inch (203MM) Width. Key Points For Each Label Are: CanLiFe Lithium Golf Cart Battery * A Single Drop In...Capacity 95-100 Kilometer Range 48 Volt 150 Amp Hour (7.77 Kilowatt) Capacity 130 + Kilometer Range 72 Volt 56 Amp Hour (4.14 Kilowatt) Capacity 35-40 Kilometer Range Plus A Matching Top Label For Each: Each With Model & Capacity Plus The Safety Warnings: DO Not: Short Circuit Crush Disassemble Incinerate Heat Above 60 Celsius Submerge In Water Warning: Risk Of Fire Or Explosion - Avoid Mechanical Shock Winter Storage: Charge To 80%, Bring Inside, Store Abo...
...Knowledge: Understanding of automotive services will be a plus. - UI/UX Expertise: Designing an easy-to-navigate website is crucial. We have a current landing page here: Used only for clutch replacements which forms a large part of our business, we would like to merge this onto our main website under a different design. Website services are: Clutch Replacement Mechanical work Auto Electrical work ECU programming / tuning Car Keys (This must be a big feature to the website) Mileage correction Looking to base the site under a opensource content management platform, like WordPress or others you are comfortable with. If you use any premium plugins that require purchase, you must advise, And of course SEO must be a crucial item on the list. our Facebook to get
...to manufacture. The safe resembles a medal, consisting on a top and bottom part that screws together closing the safe. 3 main screws are needed to be designed, plus some other technical details to be defined, such has best thread sizes, materials, finishing and aesthetics. Also a small locking design is needed to be implemented. To complete this project, you'll need: - Proficient knowledge in mechanical design - Expertise in working on metallic surfaces intended for functionality - Ability to make an esthetically appealing yet robust design You should be able to take my basic conceptual design, refine the aesthetics and add the necessary technical details for manufacturing, including lock and secure opening mechanism. Your deliverables will be a complete design package, s...
Require a draft sketch of the attached - Drawing Emphasis: The focus of measurements - Skillset: Candidates with proficiency in mechanical engineering and a specialty in structural components are encouraged to apply. Prior experience with motor base designs will be a significant advantage. Your task will be to create a functional and practical design, and your insightful input will be of great value.
I am in need of a coder well-versed in Lua and experienced with IceSL. The task involves: - Developing a Lua script that can generate a 3D model. - The 3D model in question is a cycloidal gear and pinion element, generally employed In clock gears. Skills and Experience Required: Mechanical Engineer - Proficient in Lua scripting language. - Experience with IceSL for 3D modelling. This task requires an understanding of code as well as a foundational knowledge of mechanical engineering principles. If you possess these skills and experience, I'd love to hear from you. Please include any relevant work in your proposal.
K zobrazení podrobností se zaregistrujte nebo přihlaste.
I need a skilled content creator who can provide various textual and visual content to populate my website. The project involves creating content for more than ten pages. In the area of Mechanical equipment. Key Responsibilities: - Develop high-quality, engaging, and SEO-optimized written content for each page. - Source and format relevant images to accompany the text on each page. Requirements: - Proven experience in writing engaging web content. - Proficiency in SEO practices to ensure the content is search-engine friendly. - Strong eye for visuals and ability to source and format relevant images. This project is ideal for a freelancer who can work efficiently, has a background in content creation and SEO, and can deliver a high standard of work.
...Interior Design: This car needs to be visually appealing, and project a modern, sleek, and commercial image. - Mechanical and Electrical System Design: We need a team with a strong focus on engineering, able to create systems that are energy efficient and innovative. - Innovations: This is an important aspect of the project. We're looking for a team that can bring fresh ideas to the table, with a particular interest in self-driving capability, voice control assistant, wireless charging, advanced safety features, and an innovative AutoCharging system using the car's tire motor. Ideal freelancers for this project should have experience in: - Industrial design and 3D modeling - Mechanical and electrical engineering, particularly in the automotive industry - A creat...
I'm seeking a proficient 3D modeler with extensive knowledge in AutoCAD software. Your task will be to create a high-detail 3D model of mechanical parts. Expectations: - Use AutoCAD for all modeling tasks - Model will comprise complex mechanical parts - Provide high-level detail for all aspects of the model Ideal Skills: - Competency in AutoCAD software - Experience in modeling mechanical parts - Attention to detail - Proven track record in producing high detail 3D models Please attach your previous work samples which align with these requirements for consideration. I look forward to working with a skilled individual who takes precision seriously.
Looking for an industrial / mechanical engineer professional who can assist in a variety of areas, from product design to overseeing the production process for skate facilities. Key Responsibilities: - Skatepark Design: You'll be responsible for designing skate facilities that are both innovative and practical. - Skatepark Construction: You'll be overseeing the construction of these facilities, ensuring they're built to a high standard. - Production Process Management: You'll be handling the production process for the skate facilities, ensuring they're manufactured efficiently and to spec. Ideal Candidate: - Spoken and written fluent English - Proven experience in industrial and mechanical engineering, particularly in product design and manufacturi...
I'm seeking a skilled and experienced designer to assist in a project related to manufacturing machinery. Specifically, I'm in need of: - Creative and functional designs for my proposed machinery - Knowledgeable input and advice on manufacturing process optimization - Ideas for...related to manufacturing machinery. Specifically, I'm in need of: - Creative and functional designs for my proposed machinery - Knowledgeable input and advice on manufacturing process optimization - Ideas for system integration This will require understanding of the industry, manufacturing process, machinery operation, and system integration. An ideal candidate will have a strong background in mechanical engineering, industrial design or a relevant field, with experience in machinery ...
I'm in need of a highly skilled CAD mechanical designer who can accurately develop a 3D and 2D design for a manufacturing machine. This design must include the following components: - Gears - Shafts - Bearings The machine's intended use is within a manufacturing environment and will be heavily involved in sheet metal forming processes. The ideal candidate will have proven experience in designing machines for similar applications, with a keen understanding and expertise in the mentioned components. Proficiency in using CAD software is a must for detailed and accurate designs.
I'm in need of a seasoned Mechanical Engineer with specific expertise in heat transfer, fluid dynamics, and thermodynamic cycle analysis to assist in the development of a revolutionary solar thermal engine patent prototype. Key Requirements: - Conducting in-depth thermodynamic cycle analysis for the solar thermal engine. - Designing the engine layout and key components to optimize its performance. - Understanding and managing the behaviors of steam vapor and condensate. - Proficiency in analyzing fluid flow, power, and pressure drop. - Knowledge of steam hammer and heat pipe behavior for this application. - Experience with developing engines within the 1-5 kW power output range is essential. Ideal Skills: - Proficiency in CAD software, such as SolidWorks. - Experi...
...in both electrical and mechanical engineering. Our aim is to design a high-power attachable biking dynamo/alternator for bicycles. The primary objective of this project is to create a device that can generate and store significant power for storage in high-capacity batteries. This dynamo/alternator should deliver a high power output, mainly focusing on efficiency, ease of use and weight. Key requirements: - Designing a high-power dynamo/alternator that can support extensive power needs. - The device should be attachable to a standard bicycle without impacting its performance or aesthetics. - Prioritizing power output over size or weight, meaning the final product can be robust as needed. Your role will be to: - Combine your expertise in electrical and mechanical engine...
I'm seeking an expert in Solidworks design to create instrument GA drawings for water quality analysers. Proficiency in mechanical instruments and knowledge of water quality analysers is indispensable for this task. Key responsibilities will include: - Designing comprehensive water quality analyser models using Solidworks in 3D & 2D GA. - Incorporating specifics of mechanical instruments in analyser designs. - Adapting designs based on functional aspects of analysers. Ideal applicants should be seasoned Solidworks designers with hands-on experience in mechanical instruments. Understanding of water quality analysers would make a perfect fit. If you are meticulous and adept at interpreting technical standards, I'd be glad to work with you.
I need a Mechanical Engineer to design a carbon fibre scooter prototype. This project starts with the ProE proof of concept CAD model, attached. It eventually needs to be progressed to be ready for manufacturing. Ideally, bicycle and scooter design history would benefit. The job will start in about six weeks. The CAD model for prototyping is required by the end of June. Drawings and BOM for costing are necessary. I will cost with your assistance. It will be a collaborative project, with phone and email communications, and include prototype parts. An hourly rate is appropriate. Don’t apply with a structural, civil, graphics, animation or architectural background. It is a light engineering job.
...will use the parts for 3d printing. The original model is in 3ds, fbx and obj format. Image of the model is attached and I only need you to work on the arm and upper body parts, which is circled in red. Key deliverables: - The final mechanical parts should work be compatible with standard CAD software, such as SolidWorks, Onshape. STEP or SLDPRT format works for me. - The final model should be as close as possible to real human body size, The total height of this woman will be 165cm. - I only need the 3d parts to be a shell, no need for inner mechanical structure, but each pieces of the shell should have mechanism to connect to each other using screws. This project provide good example on arm - each 3d print part will have smooth surface, which
I require an adept CAD designer, with expertise in CATIA, for the development of a mechanical component meant for automotive use. The ideal candidate should: - Have extensive mechanical CAD design experience. - Demonstrate proficiency in CATIA. - Display an understanding and familiarity with automotive components. This project will require you to create complex, precise designs that will increase the efficiency of an essential automotive component. Prior industry experience would be invaluable. Your resourcefulness, creativity, and problem-solving abilities will be put to great use.
I'm in search of a highly skilled AutoCAD drafter with specialization in commercial kitchen design. Key responsibilities will include: * Creating a efficient layout plan for an open kitchen setup * Assisting in the selection of suitable kitchen ...Creating a efficient layout plan for an open kitchen setup * Assisting in the selection of suitable kitchen equipment * Drafting accurate plumbing and electrical plans pertinent to commercial kitchens Ideal candidates must have a deep understanding of commercial kitchen requirements and functionality, previous work experience with similar drafting tasks will be highly favored. Familiarity with mechanical and electrical plans is crucial. I look forward to working with a visionary who understands the essence of a well-designed comm...
I'm seeking an experienced mechanical engineer with expertise in CAD to assist me in finalizing the final commercial design for the StarDrive Propulsion system which will be used in satellite station keeping applications. Comprehension of the design is a prerequisite, kindly inform yourself through and my YouTube channels, Dennis Plews and Dennis J. Plews. Tasks will include: - Familiarizing yourself with the existing design - Assisting in implementing specific mechanical components into the final design. Ideal candidate must have: - Proficiency in ANSYS level CAD. - Mechanical engineering experience and background. - Familiarity with integrating specific mechanical components. - Understanding of propulsion systems or similar technology would be benefici...
I am seeking a skilled digital illustrator with a flair for AI style artistry. The project will involve creating captivating illustrations of mechanical animals, really playing with the concept of life and machinery. Details: - The art style should reflect a unique appreciation for AI aesthetics. - The main theme revolves around mechanical animals, incorporating realistic detail and abstract concepts. - The chosen medium for this project is digital illustration. Ideal Skills: - Proficiency in AI style digital illustration. - Experience in drawing mechanical themes. - A knack for combining realism and abstract elements effectively. If you can translate complex ideas into visually stunning digital art, I want to hear from you. This is your chance to be a part of a...
...animator skilled in creating high-detail mechanical animations using Blender. - Task: Your main task will be to animate a robot arm with vision sensors with high precision and realism. This task requires both creative and technical skills, as the animation needs to be intricately detailed yet smoothly executed. The robot arm will need to move, and the sensors will have to show their field of views (FOV). This will illustrate the fields of what our safety solution sees. - Experience: Ideally, you have a strong background in mechanical design or a related field. Prior experience in animating mechanical is preferred. - Skills: Proficiency in Blender is a must. Strong understanding of 3D modeling, rigging, texturing, lighting, and rendering to bring the mechanical...
**Freelance Opportunity: Cardboard Craft Project Designer** We are seeking a talented and creative freelance professional with a background in structural engineering, mechanical engineering, or arts & crafts to develop unique cardboard craft projects for children aged 5-10. The ideal candidate will have a passion for crafting, an innovative approach to design, and the technical skills to ensure projects are both engaging and structurally sound. Please see attached file to see what are the limitations. **Project Overview:** - **Craft Focus:** Create engaging and educational cardboard craft projects suitable for children aged 5-10. - **Design Constraints:** Crafts must be limited to using specific actions and techniques: cut, score, and punch. - **Scope:** Develop 50 unique...
I'm in need of a company logo with a modern aesthetic, predominantly in red and black. The logo should be memorable, unique and versatile. I just the company name in a specific fond, with unique features that tie the 2 words together or has some graphic element to it like gears. The company designs machinery so would like it mechanical and modern looking. Not looking for just font generated, I can do that. It needs to be unique that ties the 2 works or has some graphic incorporated.
I'm seeking a skilled mechanical design engineer to provide the design for a high-capacity denest machine to be used specifically in the food industry. The designed machinery needs to be able to handle 1000+ trays per hour. Key requirements for the job include: - Profound experience in mechanical design, specifically for machinery used in the food industry. - Knowledge and understanding of denest machines and their operational mechanics not essential but beneficial - Proven track record in designing machinery that can perform at high capacity. - Familiarity with safety and hygiene standards in the food industry. - can produce 3D model and manufacturing drawings Your role will involve developing a comprehensive design which ensures the functionality, longevity, and ...
I seek an experienced engineer equipped with both mechanical and aeronautical skills. The mission is to create a high-quality rendering for an octocopter drone, intending for agricultural chemical spraying tasks. Confidentiality is paramount so signing a Non-Disclosure Agreement (NDA) will be required. KEY DETAILS: - Purpose: Agriculture chemical spraying - Payload: Accommodate 250 lbs (not including drone weight) - Flight distance: Up to 5 miles Technical drawing skills, a solid understanding of drone aerodynamics, and experience in mechanical drone development will come in handy for this project. Reach out if you find this interesting and we can delve deeper into the specifications.
As a professional with a background in Mechanical Engineering and valid US registration, I am seeking assistance in reviewing and approving an ASTM testing standard for corrections locks. Your role is of utmost importance as it includes the validation of the test report using your official stamp after careful review. Brief requirements: 1. Registered US Mechanical Engineer 2. Proficient with ASTM testing standards 3. Able to review digital video footage Your expertise will be imperative in assessing and interpreting the digital video footage which documents the testing procedure. Detailed experience in the sector of lock mechanisms, especially corrections locks, is needed for comprehensive understanding and analysis. Please confirm you have the official stamp r...
I'm in need of a mechanical drawing takeoff professional who can focus on the equipment layout assessment for an HVAC project. Key Tasks: - Provide detailed metal duct layout and takeoff - Detail dimensions and lengths of ductwork - Identify connection points and necessary fittings - Specify material and gauge requirements for the ductwork This project requires someone with a deep understanding of HVAC systems and experience with creating detailed equipment layouts. Your work will be critical in ensuring the efficient and cost-effective operation of the HVAC system.
I'm in need of a specialist to design a machine specifically for cutting hair. This isn't your run-of-the-mill task, some unique skills are necessary: - Experience with mechanical design, specifically machines for intricate tasks. - Understands the physics of hair and appropriate cutting methodologies. - Patience and the ability to iterate through designs as there is no immediate time constraint. Your creativity and expertise will be highly appreciated. Let's create a new and efficient hair cutting solution together.
I'm in need of an Ansys expert who can help me simulate a mechanical component and analyze it for stress. The simulation is to be conducted under dynamic load conditions. Key Responsibilities: - Understand the product design and its intended usage. - Create a dynamic loading situation within Ansys. - Conduct a thorough stress analysis of the mechanical component. - Provide a detailed report on the simulation results. You should have: - Proficiency in Ansys, particularly in stress analysis. - Experience in working with mechanical components. - Understanding of dynamic load simulations. - Ability to interpret and present simulation results. Your work will be instrumental in helping us ensure the reliability and safety of our product.
As a client, I'm seeking a skilled mechanical design engineer for a specific project. - The main responsibilities include structural skid design calculations and tank design calculations. - The skid is required to have a weight between 1000 kg and 5000 kg, with dimensions of 2m x 4m. - The tank in question is a mixing tank. You should be well-versed in mechanical design, with a strong background in: - 3D modeling - Prototyping - Stress analysis Your comprehension of structural skid design and tank design is crucial. The ideal candidate will have relevant design experience and be able to provide efficient, precise, and innovative solutions to meet the project's requirements.
We are a UK-based company in need of an experienced and capable electronics technician. Your role will involve servicing our storage lockers spread across different locations ...ideally be adept in the following: - Repairing and performing maintenance on storage lockers to ensure they are in top working condition. - Troubleshooting and diagnosing locker problems, specifically in relation to mechanical faults and electronic component failures. Your knowledge and skill in handling storage lockers, coupled with your ability to adapt to different locations, will be pivotal to our operation's success. We look forward to leveraging your technical expertise to ensure our lockers' continuous function. Knowledge of electronic component failures and mechanical faults is ...
I'm in need of a basic conceptual model for an Engineering project using Matlab Simulink. Key Points: - The task involves creating a basic conceptual model. - The domain of the project is in Engineering. You might be working with structures, mechanical systems, electronics or similar. - The model doesn't need to be overly detailed or complex, it just needs to demonstrate the concept. Ideal Skills: - Strong understanding of Engineering concepts. - Proficiency in Matlab Simulink. - Ability to translate complex ideas into simple, clear models.
We're in need of someone proficient in mechanical drawing for our workshop. We have more than 10 machines for which we need detailed drawings which expose a breakdown of components. The ideal candidate should have: - Experience in preparing mechanical drawings for industrial machinery - Great attention to detail - Comprehensive knowledge of machine components This should give freelancers a holistic understanding of the inner workings of each machine, to be used for maintenance and troubleshooting procedures. Please include sample work of past mechanical drawing projects in your bid.
I'm looking for an expert in Heating Systems who can assist me with a pressing issue. More than a week ago, a nut inside my heat pump unit popped and caused massive flooding to my unit. The task is on site to examine the heat pump unit and provide a written report of possible causes. Further details of the issue to be provided later. Skills and Experience: - Extensive knowledge and experience in HVAC, specifically heating systems in condos - Background in system troubleshooting - Good problem-solving skills - Ability to work in a timely manner Location: North York, Toronto, Ontario
I require the services of an experienced mechanical engineer with specialization in HVAC systems. Key Tasks: - Analyze and enhance the air conditioning system in a commercial space. - Implement ventilation solutions in a medium-sized building. Skills & Experience: - Proven track record in HVAC engineering is a must. - Experience with commercial cooling requirements. - Proficiency in designing and implementing ventilation systems for medium-sized buildings. Looking forward to your bids!
I'm in need of a skilled Mechanical Design Engineer to help in the early stages of my project. Right now, I am looking for someone who can create basic CAD models. The ideal candidate should be: - Experienced in CAD modeling, specifically in creating basic models. - Proficient in understanding mechanical blueprints and translating them into 3D models. - Skilled in working in a virtual team environment, and able to provide regular updates on progress. - Detail-oriented, able to ensure the accuracy and quality of the models. This is an initial step in the project and if everything goes well, there will be more advanced modeling work as we move forward. I'm looking for someone who is committed, reliable, and capable of delivering quality output in a timely manner.
I'm seeking a skilled Solidworks expert to assist with a product testing project. My product is ready with detailed CAD models already available. The focus of this project is on testing...- The main deliverable will be a comprehensive report outlining the testing process, results, and any suggested improvements or modifications to enhance the product's durability. - **Experience and Skills**: - I'm looking for someone with extensive experience in product testing, particularly related to mechanical products. Proficiency in Solidworks and a good understanding of product design principles will be highly beneficial for this project. If you have a solid background in mechanical product testing and can bring expertise in Solidworks to the table, I'd love to d...
...apartment extension. The purpose of these drawings is to be submitted for Florida permit applications. I have a site plan showing exterior dimensions of existing structure for the apartment and adjacent storage space which is to be turned into additional apartment space. I can draw up a sketch of the current apartment layout. Key Requirements: - The MEP drawings should cover all aspects of the mechanical, electrical, and plumbing systems in the apartment. This includes HVAC systems, power distribution, lighting, and water supply among others. - The interior layout doesn't necessitate a high level of detail. Rather, I'm looking for a basic layout including the major elements of the space. Ideal Freelancer: - A florida licensed architect with a background in constru...
I am looking for a skilled specialist in Fusion 360 to assist with the designing of a parametrically designed case and pump parts for 3D printing. Upon completion, I need the final CAD design in f3d format. Expertise in mechanical part design and a strong understanding of Fusion 360 is expected. The ideal candidate has experience with designing small components for 3D printing in FDM and Resin Preferred meetings over teams or google meet.
K zobrazení podrobností se zaregistrujte nebo přihlaste.
I'm in need of a professional with expertise in SolidWorks and Mechanical drawings. The project involves creating complex, detailed drawings with full annotations and dimensions. Key Requirements: - Proficiency in SolidWorks - Experience in creating detailed mechanical drawings - Ability to add full annotations and dimensions Looking for a freelancer who can deliver high-quality work within a reasonable time frame.
We're seeking a talented and passionate Mechanical Designer or Aerospace Design Engineer to join one of the pioneering companies in the sector as a freelancer, committing to at least 5 hours daily! Interested candidates should contact us, indicating their availability, experience, and the CAD software they utilize. We're excited to have you on our team! Our client is a leader in the design and sale of 3D printed RC aircraft. Driven by innovation and technology, they're on the lookout for someone exceptional who shares that same passion. As a Mechanical Designer, you'll lead exciting projects in 3D printed RC airplane design, contributing to the continuous development and improvement of your skills. You'll be responsible for creating internal 3D str...
I am looking for a skilled mechanical expert to assist in the design of a new consumer electronics product. The project involves: If you have a proven track record of designing successful consumer electronics products, and have a good eye for detail, I would love to hear from you.
...modern boutique hotel in an urban setting. This project will have the following specifics: - Urban Location: The location of the boutique hotel is in a central city area. Experience with navigating city permits, regulations, as well as urban construction is greatly appreciated. - Modern Style: The style of the hotel should be contemporary and modern. This extends to structural design and mechanical, electrical, and plumbing systems. Hence, I am seeking contractors with a track record of creating sleek, modern spaces. - 2-3 Storeys: The hotel will have between two and three floors. Engineers with specific expertise in multi-story construction and who can maximize the potential of a likely condensed urban space are preferred. I am looking for contractors with a demonstrable ...
