... 2).Digital auto-control,it has the function of manual,automatic and heating-keeping-cooling divide period to control. 3).Auto ... pipe,copper pipesbraze welding.MeltingGold,silver,copper,steel,aluminous and other metals vacuum smelting,foudry,or evaporating plating.Other ... heat seal,powder applicating,embedding plastic to metal,etc. Full Automatic Medium Frequency Induction Braze Welding Machine XZ-50B