... frequency,Double frequency) it is appliying for classes of machine parts to heat treating(quenching,anneal, temper,normalizing..., Through ... IGBT,MOSFET and any other new type induction heating machine. 2.Fast speed,low power consumption,small volume,light ... -automatic,full-automatic and divide period to control, it is more convenient use. 4.Special cycle cooling system, make sure the machine ...