Common methods of cooling the electrodes include air cooling, refrigerating and water cooling.

冷却的通常方法电极包括空气冷却，使冷却和水冷却。

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Internal heat exchanger, the heat generated by cooling water system in cooling tower in the air emissions.

内部热交换产生的热量，通过冷却水系统在冷却塔中向空气中排放。

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Some machines coming with air cooling or water cooling system can be operated for longtime.

部分机型备有冷风或水冷系统方便长时间运作。

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Thus, India's Shree Cement, which has long suffered from water shortages, developed the world's most water-efficient method for making cement, in part by using air-cooling rather than water-cooling.

ECONOMIST: Schumpeter