Water flows from the tank to the washing machine to clean clothes, then back through a filter and into the tank to be cleaned and used again.

水从水槽流到清洗机清洗衣物，然后通过过滤系统流回水槽再次利用。

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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。

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The oil-water interface neutron gauge for oil storage tank is developed by using the neutron back scattering technique.

利用中子背散射技术，研制出一种立罐油水界面中子测量仪。

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When the water heater is working correctly, water will flow from the storage tank to the collector and back again.

VOA: special.2009.04.20