Institute of Sewage Purification 污水净化学会
biological purification of sewage 污水生物净化
purification of city sewage 净化城市污水
british institute of sewage purification 英国污水净化研究所
As a chemical it's also used in insecticides, water purification, sewage treatment and the production of ammonia.
作为一种化学原料，它也被用于制造杀虫剂、提纯水、净化污水和制氨。
The operation situation of sewage purification plant influences directly the urban water environment.
污水净化厂的运行状况直接影响着城市水环境的好坏。
ObjectiveTo study technology of purification treatment of sewage of hospital.
目的研究医院污水的净化处理技术。
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