friction board

例句：

1. 1. The friction board is used to measure the friction between two surfaces.
   摩擦板用于测量两个表面之间的摩擦力。
2. 2. The friction board was designed to reduce wear and tear on the machine.
   摩擦板被设计来减少机器上的磨损和损耗。
3. 3. The friction board is essential for maintaining the smooth operation of the machine.
   摩擦板对于保持机器的平稳运行至关重要。