extraction n. 1.抽出,拔出。 2.【化学】提取(法);萃取(法);回收物,提出物;精炼。 3.精选,摘要。 4.血统,家世,出身。 5.【数学】开方,求根。 spirit of the first extraction 原汁酒。 a man of foreign extraction 外国(血统的)人。 extractions from a book 一本书的内容摘录。 an extraction of 81 percent 百分之八十一的出粉率,八一粉。 the extraction of root 【数学】开方法,求根法。
Fumes and hot air are discharged in such manner as not to be a nuisance . metal hood , air - ducts , extraction fans , grease filters water scrubbers of exhaust systems are maintained in good order 排放油烟和热空气的方式不会造成滋扰,而排气系统的金属罩气槽抽气扇油烟过滤器水剂涤气系统均保养良好
Fumes and hot air are discharged in such manner as not to be a nuisance . metal hood , air - ducts , extraction fans , grease filterswater scrubbers of exhaust systems are maintained in good order 排放油烟和热空气的方式不会造成滋扰,而排气系统的金属罩、气槽、抽气扇、油烟过滤器水剂涤气系统均保养良好;