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定 向钻孔
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定向钻孔
directional drilling
定向钻孔
方位测量
orienting hole survey
楔尖式钻孔定向器
whipstock
钻孔定向仪
oriented core barrel
钻孔定向偏差
directional deviation of borings
钻孔定向偏离
directional deviation of borings
钻孔定向器
hole director
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