Cofferdam: Watertight enclosure from which water is pumped to expose the Bed of a Body of water in order to permit the construction of a pier or other hydraulic work.

围堰：防水围护堤，将堤内的水抽尽，露出水底以便建造桥墩或其它水工结构。

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This paper introduces the composition of double-heat sources system, the regulation of united operation of double-heat sources, hydraulic work condition and operating regulation methods of pipeline.

介绍了双热源系统的组成、双热源联合运行时的规律以及管网的水力工况和运行调节方法。

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DC motors work as power device of the hydraulic system in the project machinery, mainly matched with hydraulic pump.

直流电动机工作电源装置的液压系统中的工程机械，主要是配合液压泵。

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He says that the Monterey geological formation is uncommon, and at present, hydraulic fracturing cannot work there.

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After two years of work, without modern hydraulic machinery, it was officially opened by then Prime Minister Harold MacMillan.

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Chuck graduated from the Illinois Institute of Technology with a degree in mechanical engineering 60 years ago and went to work for a large manufacturer designing hydraulic valves.

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