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Terms for subject Drilling containing 定 心 | all forms
ChineseEnglish
内外筒相对固定的双筒取心筒core barrel of double tube rigid type
定向取心的岩心oriented core
定向钻井取心筒orienting core barrel
定向钻井取心筒oriented core barrel
销定位联动方钻杆补心pin drive kelly bushing
销定位联动滚子补心pin drive roller bushing

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