The registration address of zhengzhou city's three power mechanics limited company is located on the north side of the road in the town of zhengyang city, with the registration authority being the zhengyang city market supervisory authority, with the legal personality representing yang liang city and covering general projects: construction of machinery for construction works; manufacture of general equipment (excluding special equipment); manufacture of machinery parts, parts and components; manufacture of general parts; manufacture of technical services, technology development, technical advice, exchange of technology, technology transfer, technology promotion; manufacture of equipment for industrial automated control systems; manufacture of server control bodies; processing of metal surfaces and heat; manufacture of exercise and powder metallurgy products; sale of exercise and powder metallurgical products; import and export of goods; import and export of goods; human resources services (without occupational brokering activities, labour dispatch services); manufacture of general valves and rotor blades (without special equipment manufacture); sale of valves and cyclones; development of valves; manufacture of hydraulic machinery and components; sale of hydraulic machinery and components (in addition to projects authorized by law and subject to a trade licence), construction projects (subject to approval by law, subject to the approval