... 380V,30-80KHZ 4. Metal superficial heating is perfect This high frequency induction heating machine A. Heating (hot forging, hot fitting and ... , kitchen and table ware, art ware, standard part, fastener, fabricated mechanical part, bronze lock, rivet, steel pin and pin.2 ... stainless steel flat base, aluminum sheet and tubular electric heating elements of various forms. D. Annealing (tempering and ...