New material technology promotion services; Instrument manufacturing; Instrument sales; Mechanical equipment research and development; Mechanical equipment sales; Mechanical and electrical equipment manufacturing; Mechanical and electrical equipment sales; Metal product sales; Automotive parts and accessories manufacturing; Automotive parts retail; Railway locomotive vehicle parts manufacturing; Railway locomotive vehicle parts sales; Civil aviation material sales; Mold manufacturing; Mold sales; General parts manufacturing; Mechanical parts and components sales; Rubber product manufacturing; Rubber product sales; Plastic product manufacturing; Plastic product sales; Synthetic material manufacturing (excluding hazardous chemicals); Synthetic material sales; High-quality special steel material sales; High-performance non-ferrous metal and alloy material sales; High-performance fiber and composite material sales; Forging and powder metallurgy product manufacturing; Forging and powder metallurgy product sales; Electrical signal equipment device manufacturing; Electrical signal equipment device sales; Electronic component manufacturing; Electronic components and electromechanical component equipment sales; Pneumatic power machinery and component manufacturing; Pneumatic power machinery and component sales; Hydraulic power machinery and component manufacturing; Hydraulic power machinery and component sales; Technical services, technology development, technical consultation, technology exchange, technology transfer, technology promotion; Technology import and export; Goods import and export.