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扩眼器
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套管钻井
释
reamer
扩眼器
通过自身刀翼旋转时产生的切削作用破碎岩石,在套管钻井过程中和领眼钻头配合使用的装置。
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soil protozoa
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soil quality
soil quality assessment
soil quantity evaluation of Chinese materia medica
soil radioactive pollution
soil reaction
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soil regionalization in China
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Soil Remediation
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