关键词：钻井工程；钻井参数监测系统；软件系统；设计 [gap=1648]Key words：drill engineering；drilling parameter monitor system ；software systems；design ...
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portable engineering drill 轻便工程钻机
engineering drill 工程钻机
Social Engineering Drill 社交工程演练
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He pioneered the oil trade with Russia, bartering drill pipe, petrochemicals and engineering services to the Soviet Union in exchange for crude.
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