clearance treadle

例句：

1. 1. The factory has a large drainage system to ensure proper clearing of wastewater.
   工厂有一个大型排水系统，以确保废水的适当清除。
2. 2. The new machine uses a clearance treadle to easily remove the debris.
   新机器使用一个清除踏板，可以轻松地移除碎片。
3. 3. The old car had a lot of rust and needed a thorough clearance to get it running again.
   这辆旧车有很多锈迹，需要彻底清除才能再次运行。