tapered drill string – phrases

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Terms containing tapered drill string | all forms | in specified order only

Subject	English	Chinese
oil	tapered drill collar string	塔式钻铤组合
dril.	tapered drill collar string	塔式钻铤串
oil	tapered drill string	分段缩径钻柱
tech.	tapered drill string	塔式钻具
tech.	tapered string of drill pipe	变径钻管 (组)