freely-rotating chain

例句：

1. 1.The freely rotating chain is a crucial component of the machine's operation.
   这个自由旋转的链条是机器运行的关键部件。
2. 2.The engineer carefully adjusted the freely rotating chain to ensure optimal performance.
   工程师仔细调整了自由旋转的链条，以确保最佳性能。
3. 3. The chain was designed with a freely rotating feature that reduces wear and tear.
   该链条设计有自由旋转特性，以减少磨损。