After improvement, the hot water circulation system was rationally collocated. Meanwhile, good profits were received.
通过改进，热水循环系统得到合理的配置，并获得很大的经济效益。
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。
Solar hot water system mainly components including collector, storage device and the circulation line three parts.
太阳能热水系统主要元件包括收集器、储存装置及循环管路三部分。
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