青云翻译

It can be seen from Figure 4, the filter layer in addition to iron filtration rate increase has little effect.

You can see from Figure 4, filter effect of iron removal by filtration rate increase is unlikely.

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It can be seen from Figure 4, the filter layer filter as soon as possible by removing the small impact.

You can see from Figure 4, filter effect of iron removal by filtration rate increase is unlikely.