... and exhaust valve, piston ring, sel ring ,O-ring, and some kinds of oil separator and turbocharger and ... cylinder head packing, cylinder cover, indicator valve, safety valve, starting valve, connecting rod, piston crown, piston ... valve spindle, suction valve seat, suction valve spindle guide, exhaust valve spindle, exhaust valve seat, exhaust valve spindle guide, exhaust valve casing, exhaust valve ...