Gas compression machinery manufacturing; Gas compression machinery sales; Gas, liquid separation and purification equipment manufacturing; Gas, liquid separation and purification equipment sales; Environmental protection special equipment manufacturing; Environmental protection special equipment sales; Fastener manufacturing; Fastener sales; Hardware product wholesale; Hardware product retail; Plastic product manufacturing; Plastic product sales; Motor manufacturing; Generator and generator set manufacturing; Generator and generator set sales; Machine tool functional parts and accessories manufacturing; Machine tool functional parts and accessories sales; Rubber product manufacturing; Rubber product sales; Electric power Manufacturing of sub-components; sales of power electronic components; processing of mechanical parts and components; sales of mechanical parts and components; manufacturing of auto parts and accessories; wholesale of auto parts; retail of auto parts; manufacturing of motorcycle parts; wholesale of motorcycles and spare parts; retail of motorcycles and spare parts; general equipment manufacturing (excluding special equipment manufacturing); general equipment repair; general mechanical equipment installation services; technical services, technology development, technical consultation, technology exchange, technology transfer, technology promotion; import and export of goods; technology import and export; sales of special equipment. Licensed items: Special equipment manufacturing.