... A. Various standard a tight firmware and other machine piece, hardware tool, handle drill, keep the hot upsetting. keep the hot ... Gas-moves components, Auto car-components, Motorcar-components, etc. machine metals parts, the Quenching for surface, of inside bore or ... Diamond saw-toothed weld, Saw tooth weld, grinding machine tool welds, drill the machine tool welds blade tool welds .The other metals ...