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Terms for subject Drilling containing 双重 | all forms | in specified order only
ChineseEnglish
双重作业dual job
双重关井阀dual closed-in pressure valve
双重刹车控制dual brake-control
双重加厚的double extra strong
双重加厚的double extra heavy
双重发现dual discovery
双重性某些黏土对盐水无反应，对淡水敏感dual nature
人工和自动双重控制dual operation
双重螺纹同步上扣的套管螺纹two-stage pipe threads

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