... machine parts to quenching,anneal 2.Adopts Siemens IGBT,MOSFET Copper induction coil contain four types (Medium frequency,High frequency ... parts to heat treating(quenching,anneal, temper,normalizing..., Through heating,braze welding,smelting, other field and with CE predominance as ... belows: 1.The induction heating equipment mains circuit adopts Siemens IGBT,MOSFET and any ...