guide pulley

例句：

1. 1.The guide pulley is used to adjust the tension of the rope.
   导轮用来调整绳索的张力。
2. 2. The guide pulley is essential for the operation of the machine.
   导轮对于机器的运行至关重要。
3. 3.The guide pulley helps to maintain the correct alignment of the machine parts.
   导轮有助于保持机器部件的正确对齐。