At the meantime, it generalizes the water circulation into natural and human water circulation system using water supply and water consumption unit to simulate their structure factors.
同时，将流域水循环系统概化为自然水循环系统和人工水循环系统，分别用供水单元和用水单元模拟其结构构成要素。
The safety design of gas supply system, hot water circulation system, alarm system and so on in atmospheric gas hot-water heating boiler room is discussed.
探讨了燃气常压热水供热锅炉房燃气供气系统、热水循环系统、报警系统等的安全设计。
Therefore, this conclusion should be taken into account when we study how to select one circulation pump with reason in a hot-water supply system.
管段流量与终点水温的关系，是热水供应系统中循环泵选择计算研究的一个重要理论依据。
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