crowned pulley

例句：

1. 1.The crown pulley is a crucial component in the design of the machine.
   皇冠滑轮是该机器设计中的关键部件。
2. 2.The engineer carefully inspected the crown pulley to ensure it was functioning properly.
   工程师仔细检查了皇冠滑轮，以确保它正常工作。
3. 3.The crown pulley was replaced with a new one after several years of use.
   使用几年后，更换了一个新的皇冠滑轮。