jack and circle


  • 翻译:钻柱紧扣装置

同义词

1)jack and circle,钻柱紧扣装置2)tightening-up device,扣紧装置3)emergency tripping device,紧急脱扣装置4)latch shaft,锁扣[压紧装置]轴5)drillstring twistoff,钻柱脱扣6)left-hand string,左扣钻柱

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