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来源:雅诚德英语网
There are several different types of electrode designs currently in use. Some designs are internal to the boiler while others are installed in external mounting POTS.
目前有几种不同类型的电极设计。一些设计是将电极置于锅炉内部,一些则是将电极安装在锅炉以外的安装区域。