...二次供水;无负压供水;优化调度;二位三通电磁阀 [gap=697]Key words】Changing frequency to control speed; The secondary water supply; No-negative pressure water supply; Optimization dispatchers; two-position thre..
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Physical, chemical and biological control methods in the purifying water process and the secondary water supply system in Chinese water supply industry are discussed.
重点介绍了目前国内供水行业所采用物理、化学以及生物的方法在水厂净水处理及二次供水过程防除摇蚊污染的研究；
Apart from the secondary water supply systems, the drainage systems and the air-raid shelters, no significant difference was found in the positive rates between the central area and the marginal area.
除二次供水、市政排水设施和防空洞外，中心城区与边缘城区蚊孳生阳性率无明显差别。
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。
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