pivot gearing

例句：

1. 1. The pivot gearing of the machine is essential for its smooth operation.
   机器的支点齿轮对于其平稳运行至关重要。
2. 2. The new design uses a more efficient pivot gearing system.
   新设计采用了更高效的支点齿轮系统。
3. 3.The engineer carefully adjusted the pivot gearing to ensure optimal performance.
   工程师仔细调整了支点齿轮，以确保最佳性能。