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Terms for subject Technology containing drill collar | all forms | exact matches only | in specified order only
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drill collar加长钻铤
drill collar钻环
drill collar钻孔口
drill collar break off断钻键
drill collar lubricants钻铤丝扣油
drill collar stabilizer钻环稳定器
full hole drill collars全孔径钻铤
hydraulic drill collar液压钻机套环
hydraulic drill collar液压钻机套管
hydraulic drill collar液压钻机套圈
non-magnetic drill collar无磁性钻头卡圈
plain drill collar扁头凿卡环
plain drill collar扁头凿套环
rubber collar drill steel橡胶扁肩钎
staved collar drill shank墩粗轴肩式钎维

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