The results of circulated heating of the deaeration heating systems were com-pared by using steam injector to replace the hot water circulation pump.

将使用蒸汽喷射器替代热水循环泵对除氧加热系统进行循环加热的效果进行了对比，认为应用蒸汽喷射器可以起到节能、安全、高效、方便的作用。

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Therefore, this conclusion should be taken into account when we study how to select one circulation pump with reason in a hot-water supply system.

管段流量与终点水温的关系，是热水供应系统中循环泵选择计算研究的一个重要理论依据。

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At the initial stage of development, the main oil production methods give priority to hydraulic piston pump and closed hot water circulation.

开发初期，主导开采方式主要以“水力活塞泵、闭式热水循环”等采油工艺为主。

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