介绍当高位消防水箱压力不足时常用的两种增压设施的工作原理；
Introduces work principles of two adding pressure establishments for high-place fire protection water tank;
建筑消防供水系统中，当消防水箱不能满足静压要求时，应设增压设施。
The pressure facilities should be used to increase the water pressure in a fire water supply system when static pressure in a water tank is inadequate.
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