Generator and generator set manufacturing; generator and generator set sales; motor manufacturing; mechanical and electrical equipment manufacturing; motor and control system research and development; electrical equipment repair; electrical equipment manufacturing; micro motor and component manufacturing; ordinary valve and cock manufacturing (excluding special equipment manufacturing); pneumatic power machinery and component manufacturing; pneumatic power machinery and component sales sales; research and development of valves and cocks; sales of valves and cocks; manufacturing of general parts and components; processing of mechanical parts and components; agricultural machinery manufacturing; sales of mechanical parts and components; manufacturing of auto parts and accessories; manufacturing of motorcycle parts and accessories; retail of motorcycles and spare parts; research and development of motorcycles and parts; import and export of goods; import and export of technology; import and export agency.