... to quenching,anneal 2.Adopts Siemens IGBT,MOSFET Copper induction coil contain four types (Medium frequency,High frequency,Ultrahigh ... ..., Through heating,braze welding,smelting, other field and with CEpredominance as belows: 1.The induction heating equipment mains circuit adopts ... Siemens IGBT,MOSFET and any other new type induction heating machine. 2.Fast speed,low power consumption,small ...