left-hand screw drill pipe

例句：

1. 1.The left-hand screw drill pipe isused to drill holes in the rock.
   左旋钻杆用于在岩石中钻孔。
2. 2. Theengineer carefully adjusted the left-hand screwdrill pipe to ensure a smooth flow ofwater.
   工程师仔细调整了左旋钻杆，确保水流畅通。
3. 3. The left-hand screw drill pipewas essential for the construction ofthe new bridge.
   左旋钻杆对于建造新桥至关重要。