water is f_only in the lower place,it must be pumped up to the city.T hen it is s_ to each home.Dams are often bin a river to keep thewater from flowing away.T hen a new lake isformed.T he city knows how much water will be nand allows the extra water to flowbelow the dam...
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Dams are often b( ) in a river to keep the water from flowing away.Then a new lake if formed.The city knows how much water will be n( ) and allows the extra water to flow below the dam.I( ) the way ,the city stors water for its use. There is usually a b( ) near the dam...
1. Here is an old-fashioned pump for drawing water from a well. 这里有一个旧式水泵可从井里抽水。 pump 网络解释 1. 水泵:向左转,可看到一个水泵(Pump),先以油润滑手柄(Use oil on Handle),再用水泵抽走水(Use Handle). 拿走铁链上的木塞起子(Corkscrew). 然后返回我被困的船舱(Hold),先以湿海绵...
Department June 26 determined that the state's pumping of water from Devils Lake into the Shey-enne River no longer requires a water quality permit.rnL. David Glatt, chief of the department's environmental health section, said the pumping qualifies as a transfer from one water body to ...
Flooding the pipe in this manner allows the pumper truck to then pump water from the lake or pond, through the hydrant, with little or no priming necessary so as to meet fire suppression demands. A vent valve located on the ... SL Merrett - US 被引量: 22发表: 1996年 Flexibility of...
The performance of water-to-air heat pumps using lakewater as the heat source and sink has been investigated. Direct cooling with deep lakewater has also been considered. Although the emphasis of the work was with southern lakes, many results also apply to colder climates. During the project ...
A purification system is provided for purifying the water of eutrophic lakes and marshes by partitioning the target lake/marsh to form a specified water treating area therein. For this purpose, a partitioning structure is provided for en... H Yoda,S Nakadaira,T Masuda,... - US 被引量: 41...
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