1. The relative density of the hydrolysis and acidification tank: the ratio of the area of ??the pulse damper of the hydrolysis and acidification tank of the aerator to the total area of ??the service item.

2. Air exchange volume: the volume of air charged into the water per unit time for each aerator under standard conditions. It is indicated by the standard ventilation rate, the maximum ventilation rate and the minimum ventilation rate.

3. Standardize the oxygen migration speed: the oxygen concentration delivered by the microplate aerator to the water with zero dissolved oxygen concentration per unit time under the detection standard of the standard condition.

4. Standardize the high efficiency of oxygen migration: standardize the ratio of the oxygen concentration into the water and the oxygen supply concentration of the aerator under the special lecture.

5. Higher efficiency than standard oxygen migration: the percentage of oxygen incorporated in each meter of water level under the standard standard or the oxygen concentration incorporated in 1 cubic meter of gas path per meter of water level.

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