上述之可逆洗浮床式反向污水處理系統中，該輕質過濾砂為比重小於水的過濾顆

上述之可逆洗浮床式反向污水處理系統中，該輕質過濾砂為比重小於水的過濾顆粒。

結果 (英文) 1:

The above-described washing reversible inverse floating bed wastewater treatment system, the light is less than the specific gravity of water filter sand filter particles.

結果 (英文) 2:

In the reversible washfloat-type reverse sewage treatment system, the lightweight filter sand is a filter particle with a specific gravity less than water.

結果 (英文) 3:

In the reversible washing floating bed reverse sewage treatment system, the light filter sand is a filter particle whose specific gravity is smaller than that of water.