Draw off system water until boiler pressure reads zero.

将系统中的水排出，直到锅炉压力读数降为零。

youdao

The utilization coefficient of irrigation water contains the utilization coefficient of canal system water and field water.

灌溉水利用系数包括渠系水利用系数和田间水利用系数。

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The design and application of direct-return system water system of air-conditioning system, and the characteristics of self-balancing control valve are discussed.

本文介绍了异程空调水系统的设计、调试方法和在异程空调水系统中应用较多的自力式平衡阀的特性。

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Between thirty and thirty-five women used each system to pump water from the ground or a stream.

VOA: special.2010.01.11

So a closed system would be, for instance, a glass of ice water with an ice cube in it, with the lid on top.

因此闭系可以是，比如说，一杯放了,一个冰块的冰水，顶上加了盖子。

麻省理工公开课 - 热力学与动力学课程节选

The renal system has an equally important function in that way, in maintaining your water balance.

泌尿系统也同样十分重要,它能够维持体内的水平衡

耶鲁公开课 - 生物医学工程探索课程节选

The closure is being implemented to allow a disinfection of the water system and a major refurbishment of the heating and water system.

BBC: Bacteria discovery closes Launceston hospital

The water system provides drinking water for 42 million people and is a defining characteristic of the states and provinces along its borders.

NPR: Governors Meet on Access to Great Lakes

The 59-acre (24 hectare) site will also boast a solar thermal hot water system to pre-heat the water for the heating system, and a biomass boiler that will provide heat using locally-sourced wood chips.

BBC: Bristol and Bath Science Park gets new solar roof panels