1, Shackles to protect the drill pipe joints when equipped with hydraulic cushioning devices. 2, Hook the mouth with a reliable safety device. 3, The major force components are to nondestructive testing
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LANZHOU LANSHI GROUP CO., LTD.VIP会员第12年
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1, Shackles to protect the drill pipe joints when equipped with hydraulic cushioning devices. 2, Hook the mouth with a reliable safety device. 3, The major force components are to nondestructive testing
