... , plunger, bearing shell ,intake and exhaust valve, piston ring, sel ring ,O-ring, and some kinds of oil separator ... crankshaft, engine frame, engine bed, cylinder liner, o ring for cylinder liner, cylinder head packing, cylinder cover, ... suction valve seat, suction valve spindle guide, exhaust valve spindle, exhaust valve seat, exhaust valve spindle guide, exhaust valve casing, exhaust valve roller ...