... . 3.Quick heating.easy operate advantage:Environmental protection and energy saving, high efficiency, high stability, USES ... smelting.Brazing, thermal deformation, hardening, annealing, modulation, and a variety of carbide, diamond saw blade welding The ... and hardening, annealing, motors, valves, welding, tungsten, molybdenum, and copper tungsten alloy sintering as well as gold and silver melting. gold ...