roof top hose station

用法例句

An analysis on the investment and energy consumption of the water supply modes by roof water tank and variable velocity variable frequency pump was emphasized with an engineering example.

通过工程实例,重点分析了屋顶水箱给水方式和变频泵给水方式下给水系统的投资和能耗情况,论证了屋顶水箱给水和变频泵给水相结合是高层住宅小区最佳的给水方式。

[Objective] To learn algae growth in the roof water tanks of Huangpu District and the status of water pollution [Methods] 20 roof water tanks of multi-storey buildings were taken as the sample group and another 2 tap water samples as the control group.

[目的]了解黄浦区屋顶水箱水中藻类生长及污染现状。