The company has introduced advanced technology and equipments for piston ring making from Germany, Japan, America, France etc. and has imported 30 sets of key production equipments and inspection instruments for piston rings. According to customers¡¯ requirements, the company engages in designing, manufacturing and inspecting various kinds of piston rings for internal combustion engines, such as barrel-shaped rings, keystone rings,tapered rings, contorted rings, chromium plating rings, molybdenum spraying rings, nitrided rings, steel rings as well as steel belt assembly oil rings etc., which have excellent performance.