assembly pulley

例句：

1. 1. The engineer assembled the new machine with great care.
   工程师仔细地组装了新机器。
2. 2. The assembly process is crucial for the smooth operation of the machine.
   组装过程对于机器的顺畅运行至关重要。
3. 3.The assembly pulley was designed to reduce friction and improve efficiency.
   组装滑轮被设计来减少摩擦并提高效率。