crankshaft pulley

例句：

1. 1.The car's engine is running smoothly, thanks to the new crankshaft pulley system.
   汽车发动机运行顺畅，多亏了新的曲轴滑轮系统。
2. 2. The mechanic replaced the old crankshaft pulley with a new one.
   机械师用一个新的曲轴滑轮替换了旧的。
3. 3.The engineer tested the new crankshaft pulley before installing it in the machine.
   工程师在安装新曲轴滑轮之前对其进行了测试。