loop rod

例句：

1. 1. The engineer used a loop rod to tighten the bolts.
   工程师使用一个环状杆来紧固螺栓。
2. 2.The loop rod was used to guide the heavy object through the narrow passage.
   环状杆被用来引导重物穿过狭窄的通道。
3. 3. The loop rod was a crucial component in the construction of the bridge.
   环状杆是桥梁建造中的关键部件。