The design and lectotype of circulating pump, automatic return water switch valve, expansion tank and atmospheric connection pipe in atmospheric hot water heating boiler room are discussed.
对常压热水供热锅炉房的循环泵、回水自动启闭阀、膨胀水箱、大气连通管的设计选型进行了探讨。
These are mounted on the roof and provide solar power to drive the pumps necessary for circulating the water over the roof and back to the tank beneath the building.
光电板斜放在屋顶，它提供足够的太阳电能带动抽水帮浦能够让水经过屋顶回到大楼下面的水箱里循环。
All hosing connectors and pumps to keep brine circulating within the tank and through the refrigeration system.
配备所有的管路连接和水泵，保证盐水池和制冷系统的盐水循环。
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