必须定期检查大钳尾绳，使其处于良好的备用状态。
Snub lines for the rig tongs must be inspected at regular intervals and be in good working condition.
大钳销子，尾绳销子和螺栓都必须用适当尺寸的开口销加以固定。
Rig tong pins, shackle pins and bolts must be secured with the proper size of split pins.
连接猫头绳和钳尾绳到大钳上。
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