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石油钻井和修井用动力钳
Power tongs for petroleum drilling and well servicing
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油井管无损检测方法 钻杆管体电磁感应探伤
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地面防喷器控制装置专用液压气动元件
Hydraulic and pneumatic control components of control systems for surface mounted BOP stacks
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钻井和采油提升设备规范
Specification for drilling and production hoisting equipment
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