Casting, forging, stamping, welding, pressure vessel manufacturing, metalworking, machining, forming, surface heat treatment, design and manufacturing technologies for large and extra-large mechanical components, tools, abrasives, design and manufacturing technologies for precision mechanical parts, mechanical spare parts, non-metallic processing, computer-aided overall design and computer-aided machining of mechanical components, industrial maintenance and repair, as well as micro-machining technologies, hardware fittings, electronic components, electrical components, mobile phone products, circuit boards, automotive parts, aerospace products, motorcycle accessories, plastic products, low-voltage electrical appliances, and more (The copyright of this content belongs to Juzhan. Reproduction without permission is prohibited.)