... circuit 2.perfect function of protecting itself 3.Digital auto-control. 4.save electric 1.Technique parameter of kechuang ... welding.MeltingGold,silver,copper,steel,aluminous and other metals vacuum smelting,foudry,or evaporating plating.Other fieldsSemi coductor single ... heat seal,powder applicating,embedding plastic to metal,etc. Full Automatic Medium Frequency Induction Braze Welding Machine XZ-50B