Special equipment manufacturing. General projects: manufacturing of ordinary valves and cocks (excluding manufacturing of special equipment); R&D of valves and cocks; sales of valves and cocks; R&D of motors and control systems; manufacturing of industrial automatic control system devices; sales of industrial automatic control system devices; integration of intelligent control systems; manufacturing of pumps and vacuum equipment; sales of pumps and vacuum equipment; manufacturing of pneumatic power machinery and components; sales of pneumatic power machinery and components Sales; hydraulic power machinery and component manufacturing; hydraulic power machinery and component sales; special equipment manufacturing (excluding licensed professional equipment manufacturing); instrument manufacturing; instrument sales; instrument repair; electrical instrument manufacturing; electrical instrument sales; metal material sales; metal material manufacturing; hardware product research and development; hardware product manufacturing; hardware product wholesale; hardware product retail; Technical services, technology development, technical consulting, technology exchange, technology transfer, technology promotion; mechanical equipment leasing; mechanical equipment research and development; mechanical equipment sales; mechanical and electrical equipment manufacturing; mechanical and electrical equipment sales; building materials sales; electronic components manufacturing; electronic components wholesale; electronic components and electromechanical component equipment manufacturing; electronic components and electromechanical component equipment sales; fire protection equipment sales sales; safety system monitoring services; general equipment manufacturing (excluding special equipment manufacturing); auto parts and accessories manufacturing; auto parts wholesale; auto parts retail; motorcycle and parts research and development; motorcycle parts manufacturing; motorcycles and parts retail; motorcycles and parts wholesale; special equipment sales; plastic product manufacturing; plastic product sales; import and export of goods; import and export of technology.