The nit rite nitrogen average removal efficiency was 99%.
对亚硝氮的去除率在99%以上；
The average removal efficiency of total phosphorus increased from 41% to 59%, then to 69%, however it still could not meet the standard.
虽然磷的去除效果有所加强，总磷的平均去除率从41%升高到59%再到69%，但仍难达标。
The average dust removal efficiency of the SW type smoke gas purifying device can reach 96.4% under the normal work condition.
在正常工作条件下，SW型燃煤炉窑烟气净化装置的平均除尘效率可达96 4%。
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