配备有空气冷却器的软水闭路循环冷却系统改善了高炉循环水的冷却状态，是延长高炉冶炼寿命的一项重要措施。

The closed cooling system for the treated water provided with a air cooler can improve coo-ling effect. It becomes an important measure to increase the blast furnace campaign.

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蒸汽引擎被设计成闭路循环系统。当从气缸中排出的水蒸汽经过蒸汽阀门时，这样的系统可以将它们截留，然后送进压缩包里冷却。

The steam engine is designed to be a "closed-loop" system, in which water escaping from the cylinders through the exhaust valves is captured and cooled in a condensing unit.

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