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。
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。
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