... co., LTD., specializing in the production of machine guide, chuck, gear, drill chuck, shaft parts, such as surface hardening super audio ... accordance with section size and decide)3, used in gear quenching: such as Φ 160 mm gear, just ten seconds.4, high frequency is ... and all kinds of shaft, CAM, the chain wheel, the gear, valve, ball head pin, large machine guide, nodular cast iron ...