常見例句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。Keep good aeration at working area. 工作區(qū)域保持通風(fēng)良好。 返回 pre-aeration