economic benefits as central
economic benefits as central
以经济效益为中心
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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As the scale in central air-conditioning systems does great harm to the systems, water cleaning is proposed to clean the scale with discussions made on the economic benefits of such a method.
中央空调系统中形成的水垢对系统有很大的危害性，主要介绍了空调系统的水清洗方法及其所表现的经济效益。
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