但其灌水器流道小，易堵塞，需在系统首部增设过滤装置，砂过滤器即是生产中最常用的一种。

But the flow path in Micro-irrigation emitter is so small that plug happened easily, so filtering system is needed to add to the header of irrigation system.

youdao

但其灌水器流道小，易堵塞，需在系统首部增设过滤装置，砂过滤器即是生产中最常用的一种。

But the flow path in Micro-irrigation emitter is so small that plug happened easily, so filtering system is needed to add to the header of irrigation system.

youdao