沙过滤器 meaning in English

sand filter

If circumstances permit , use of layered multi - sand filter comprising both coarse sand and fine sand as filter materials fitted with automatic backwash self - cleansing device is desirable
如情况许可，宜使用包括粗沙和幼沙作为过滤物料的层沙过滤器，而过滤器应设有自动反冲的洁净装置。
23 if circumstances permit , use of layered multi - sand filter comprising both coarse sand and fine sand as filter materials fitted with automatic backwash self - cleansing device is desirable
23如情况许可，宜使用包括粗沙和幼沙作为过滤物料的层沙过滤器，而过滤器应设有自动反冲的洁净装置。