滑动环

例句：

1. 1. The engineer designed a new type of sliding ring to improve the efficiency of the machine.
   工程师设计了一种新型的滑动环，以提高机器的效率。
2. 2. The sliding ring was used to connect two pieces of equipment together.
   滑动环被用来连接两件设备。
3. 3. The sliding ring is essential for maintaining the smooth operation of the machinery.
   滑动环对于保持机械设备的顺畅运行至关重要。