称过重量后，采用过滤法，用过滤纸滤出水样中的全部固体颗粒。

That have weight, the use of filtration, filter water filter paper used in all kind of solid particles.

youdao

称过重量后，采用过滤法，用过滤纸滤出水样中的全部固体颗粒。

That have weight, the use of filtration, filter water filter paper used in all kind of solid particles.

youdao