General mechanical equipment installation services; mechanical equipment sales; mechanical equipment research and development; special equipment manufacturing (excluding licensed professional equipment manufacturing); special equipment repair; general equipment repair; general parts manufacturing; general equipment manufacturing (excluding special equipment manufacturing); textile special equipment manufacturing; textile special equipment sales; motorcycle parts manufacturing; motorcycles and parts retail; motorcycles and parts wholesale; motorcycles and Parts research and development; auto parts research and development; auto parts retail; auto parts wholesale; auto decoration supplies sales; auto parts and accessories manufacturing; electrical auxiliary parts manufacturing; electrical auxiliary parts sales; metal processing machinery manufacturing; hardware product retail; hardware product wholesale; hardware product manufacturing; technology promotion services; technical services, technology development, technology consultation, technology exchange, technology transfer, technology promotion; technology import and export