Produces steel piston rings, valve seats and parts for automobiles and motorcycles, processes cylinder liners, cast iron piston rings, wholesales piston rings, valve seats, cylinder liners, camshafts and piston rings, cylinder liners, valve seats for tooling fixtures, grinding wheels, and honing materials for automobiles, motorcycles, agricultural engines and general engines, and provides related technical services and after-sales services (not involving state-owned trade management commodities, if quota and license management commodities are involved, applications shall be processed in accordance with relevant national regulations). General items: sales of metal wire ropes and their products; sales of machinery and equipment; sales agents; trade brokers; import and export of goods; import and export of technology