... treating all classes of machine parts to quenching,anneal 2.Adopts Siemens IGBT,MOSFET Copper induction coil contain four types (Medium ... frequency,High frequency,Ultrahigh frequency,Double frequency) it is appliying forclasses of machine parts ... IGBT,MOSFET and any other new type induction heating machine. 2.Fast speed,low power consumption,small volume,light ...