... (5-20Khz) Main features 1.Adopt IGBT technology, with all-round protective function over voltage ... as stainless steel, copper, aluminum and industrial silicon, the smelting speed is very fast, effect ... aims to melt the metal into liquid by using the high temperature, which is applicable ... fitting, lamp decoration fitting, precision mold fitting, hardware handle, eggbeater, alloy steel and steel, steel and ...