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- 2016-11-06 01:51
- A hydraulic RAM jet Well Control Device is an important component assembly, a flexible switching operation effort, the u
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- 2016-10-26 12:52
- ZJGH4-5000PSI(10000PSI)Meeting of the drilling fluid By Mud valveHigh pressure from azelaicThree linksStoneElbowHigh-pre