... main applications are as following. A: parts surface heating treatment, parts surface hardening, tempering, annealing, etc.B: metal brazing, high-frequency brazing, pan ... inserting,etc.D: precious metals melting.E. dry resin, resin coating, warm resin forming,shrinkage fitting & Extraction ect.The heating of ... recognition in the field of precious metal casting. induction heating machine for welding