... heating equipment co., LTD., specializing in the production of machine guide, chuck, gear, drill chuck, shaft parts, such as surface ... , facilitate the big cross section machine rail quenching and applications.2, walking speed: double guide a quenching into, 200 -, - 400 mm/minutes ( ... wheel, the gear, valve, ball head pin, large machine guide, nodular cast iron quenching.3, brazing :all kinds of hard ...