... induction Coil with CE 1 Heat treating all classes of machine parts to quenching,anneal 2.Adopts Siemens IGBT,MOSFET ... High frequency,Ultrahigh frequency,Double frequency) it is appliying forclasses of machine parts to heat treating(quenching,anneal, temper,normalizing..., ... itself when over current,over voltage,lack of water,phase fail,over hot,etc. 3.It has the function of manual,semi-automatic ...