pre-aeration

基本解釋

By pre aeration in tanyard wastewater, the effect of primary settling improves obviously.
制革污水采用預(yù)曝氣處理后，可大大提高初沉池沉淀效果。
Keywords tanyard wastewater;pre aeration;air stirring;sedimentation tank;primary settling;sedimentation function;
制革污水;預(yù)曝氣;空氣攪拌;沉淀池;初沉池;沉淀性能;
Cook the pie for 20 minutes in a pre heated oven.
在經(jīng)過預(yù)熱的烤箱里烘烤餡餅20分鐘.
Supplemental aeration is strongly recommended.
補充曝氣是極力推薦。
The pre - christmas period be always very busy .
圣誕節(jié)前這一段時間總是很繁忙的。