This will save water, energy and secondary water pollution control and other aspects of water supply and drainage design in the environment.
本文将从节水、节能和二次供水的污染防治等几个方面探讨建筑给排水设计中的环保问题。
When exposed to the air for more than 60 days, the product will turn into water with oxygen molecules and there will be no secondary pollution.
产品放置于自然环境中，60日后与氧分子结合又自动转化成清水，不会造成二次污染。
The design procedure of waste water treatment installation for controlling secondary pollution caused by the cyclone is given.
对于该种除尘器所产生的二次污染—污水，设计了经济、适用、有效的水处理设施—平流沉降、斜管沉降、澄清。
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