piston ring for auto

S" type 3 piece combined steel oil control ring technology and production line from NPR of Japan, provided with high level piston ring production line for automotive diesel engine, steel ring production line, automatic chrome plating line, automatic heat treatment line, nitriding production line, molybdenum spraying production line, chromium ceramic coating (CCC) production line, plasma ceramic CVD production line, PVD, as well as unique engine test laboratory and friction & wear test laborotary in domestic piston ring industry, and provincial technology center, with equipments in internationally leading level.