worm and wormwheel pulley block

例句：

1. 1. The engineer designed a new worm and wormwheel pulley block for the machine.
   工程师为机器设计了一种新型的轮轴和滑轮组。
2. 2.The worm and wormwheel pulley block is crucial for the operation of the machine.
   轮轴和滑轮组是机器运行的关键部件。
3. 3. The engineer replaced the old worm and wormwheel pulley block with a new one to improve efficiency.
   工程师用一个新的轮轴和滑轮组替换了旧的，以提高效率。