... of metal component surface like quenching, annealing, tempering, drill bit welding, saw blade welding, motor rotor welding, tungsten ... efficiency with superior quality, and easily controllable techniques for the convenience of flow process and manufacturing automation. ... 1800Quenching, annealing, tempering, diathermy, metal smelting, welding of drill bits, saw blades, steel tubes and motor rotors, ...