worm pulley block

例句：

1. 1. The engineer used a worm pulley block to lift the heavy machine.
   工程师使用一个滑轮块来提升这台重机器。
2. 2. The worm pulley block was designed to reduce friction in the system.
   这个滑轮块被设计用来减少系统中的摩擦。
3. 3. The worm pulley block is essential for maintaining the smooth operation of the machine.
   滑轮块对于保持机器顺畅运行是至关重要的。