This panel is done to determine whether or not the tank has proper filtration. The "l" rating is a relative rating and is therefore not as important as the "h" rating.

从此样板可以判断槽子有无适当的过滤，“L”板的评价是相对的评价，因此不如“H”板重要。

youdao

This panel is done to determine whether or not the tank has proper filtration. The "l" rating is a relative rating and is therefore not as important as the "h" rating.

从此样板可以判断槽子有无适当的过滤，“L”板的评价是相对的评价，因此不如“H”板重要。

youdao