... , annealing, conditioning saw blades, drill, turning welding standard parts of axial etc fastener local heating, forging, melting, high ... parts of cars and motors;Hot rolling for Straight-shank Twist Drill.Welding for Drill Cut Teeth in mining, Turing Tool in machining ... Auto car-components, Motorcar-components, etc. machine metals parts, the Quenching for surface, of inside bore or part ...