Water flows from the tank to the washing machine to clean clothes, then back through a filter and into the tank to be cleaned and used again.

水从水槽流到清洗机清洗衣物，然后通过过滤系统流回水槽再次利用。

youdao

Is the filter bag cleaned and checked periodically to ensure no plugging and broken?

是否定期对过滤袋进行清洁与检验以确保无堵塞于破损？

youdao

Oil must be filtered and cleaned constantly since there are some dirt particles getting into the oil when the engine runs. Therefore, the oil filter must be regularly changed.

机油必须经过过滤，保持清洁，因为当发动机运行时有许多脏的颗粒进入机油，因此，机油滤清器必须有规律地更换。

youdao

Just like the filter in a vacuum cleaner, however, the trap must be cleaned periodically.

FORBES: Clearing the Air