... , high frequency quenching ,heat treatment , such as: crankshaft, connecting rod, piston pin, camshaft, valves, transmission of a variety of gears, a ... , Wrench.3) Hydraulic components such as: plunger of piston pump, rotor of rotor pump , the commutation of the valve shaft, gears of ... the gear pump high frequency quenching.4) Various power tools ,gear shaft of ...