saw-tooth former

例句：

1. 1. The saw-toothed teeth of the machine were worn smooth by years of use.
   这台机器的锯齿形牙齿因多年使用而磨损光滑。
2. 2. The saw-toothed teeth are designed to be sharp and durable.
   锯齿形牙齿设计为锋利且耐用。
3. 3. The saw-toothed teeth are used in cutting wood and other materials.
   锯齿形牙齿用于切割木材和其他材料。