Cheap sand was used as filtration material in the biological contact oxidation filter to study the effects of fe removal under different conditions.
以廉价的河砂为滤料，研究了接触氧化装置对铁的去除效果。
Cheap sand was used as filtration material in the biological contact oxidation filter to study the effects of fe removal under different conditions.
以廉价的河砂为滤料，研究了接触氧化装置对铁的去除效果。
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