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Based on the provided chart, engineering materials can be broadly classified into two main categories: metals and non-metals. Metals are further divided into ferrous metals, which contain iron as a primary component (examples include cast iron and steel), and non-ferrous metals (such as copper, aluminum, and bronze). Non-metals, on the other hand, are categorized into ceramics and plastics. Plastics are further sub-divided into thermoplastic and thermoset types. This hierarchical classification helps in understanding the fundamental differences and relationships between various engineering materials based on their composition and characteristics.

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From: khanhvanpham2005@gmail.com

To: peter2005@gmail.com

Subject: Hi!

Hi Peter,

I hope you are doing well!

I am currently a second year student at Hanoi University of Industry, majoring in Mechanical Engineering, which is a full-time course lasting 4 years. I have learned skills such as note taking skills, teamwork and time management. Studying at university opens up many opportunities, such as internships, networking and career development. The subjects here are difficult so I always arrange my schedule and seek help from teachers when needed. What I like most is the opportunity to meet new people and explore different perspectives

Again, I hope all is well with you Much love, peter

Khanh

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Dear, HJB company

I am writing to place an order for two CNC milling machines, model 200 MC 6453 No 67398, priced at $50,489 each. I saw this product on your website. These machines will be used to cut flat metal surfaces and improve the speed of our manufacturing process. We require delivery by November 8th to our company, HJB company, located at 56 River Street, London, UK. We will be paying in cash on delivery. Thank you for your prompt attention to this order. Sincerely,

Khanh

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The measured dimensions of the lathe shaft have been compared with the specified tolerances in the technical drawing.

Length: The design specification is 50±0.2550 \pm 0.2550±0.25 mm, meaning the acceptable range is 49.75 mm to 50.25 mm. The measured length is 50.40 mm, which exceeds the upper limit and is out of tolerance.

Diameter: The required diameter is 6±0.0046 \pm 0.0046±0.004 mm, meaning the range is 5.996 mm to 6.004 mm. The measured diameter is 6.015 mm, which is also out of tolerance.

Hole Depth: The specification is 10±0.2510 \pm 0.2510±0.25 mm, meaning the acceptable range is 9.75 mm to 10.25 mm. The measured hole depth is 10.12 mm, which is within tolerance.

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Dear Hieu,

This email provides a brief update on the current design process. We have successfully finished creating the preliminary designs and sketches. Currently, the team is working on the feasibility study for the rest of the week.

Looking ahead, our next step is to develop the detailed designs. We aim to have these completed by the end of the month in preparation for the upcoming meeting with the client.

We are making good progress and will keep you informed of any further developments.

Best regards,

Khanh

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My robot is called RoboMax. It has a rectangular body with a round head and two flexible arms, standing about 1.2 meters tall and weighing 25 kilograms. RoboMax includes a high-resolution camera for vision, a speaker and microphone for communication, LED eyes that change color to show emotions, and wheels for smooth movement. Its camera helps it recognize faces and objects, while the speaker and microphone allow it to talk and respond to voice commands. RoboMax can clean floors, remind you of your schedule, play music, and even help with homework by searching information online. It is designed for both kids and adults, and costs around $1500, making it a smart and affordable household assistant.

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Last year, while working on a group project at university, I had a problem with a 3D printer in the engineering lab. The machine kept stopping midway through prints, which ruined our prototypes and wasted time. After checking the settings and restarting the printer several times, I realized the problem was caused by a clogged nozzle. I carefully cleaned it using the proper tools and followed an online tutorial. Once the nozzle was clear, the printer worked perfectly. I felt really relieved and proud that I was able to fix the issue without needing help from a technician. It also taught me the importance of regular maintenance and staying calm during technical problems.

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My ideal job in the future is to be a Mechanical Design Engineer, specializing in renewable energy systems. This role would involve designing, developing, and testing new wind turbine and solar panel technologies. I envision myself creating innovative solutions that maximize energy efficiency and minimize environmental impact. To achieve this, a Bachelor's degree in Mechanical Engineering, coupled with advanced courses in thermodynamics and fluid mechanics, is essential. Strong analytical, problem-solving, and CAD software skills are necessary. Beyond qualifications, the job requires creativity, attention to detail, and the ability to work collaboratively within a team. I expect the job to offer flexible working hours, a competitive salary with performance-based bonuses, and opportunities for professional development, allowing me to stay at the forefront of this crucial field.