In Maanshan Iron and Steel Co., Ltd., the on-line coating repairing is used for the arch connecting bellow compensator of the top combustion hot blast stove. The design, structure type, manufacture, installation and safety control of the coated compensator are briefly introduced. It provides the valuable experience for the similar large bellow compensator maintenance.%介绍了马钢顶燃式热风炉拱顶联络管波纹补偿器采用包覆方法的在线修复，对包覆补偿器的设计、结构形式、制造、施工方案及安全控制等进行了简述，为类似大型波纹管的维修提供了可借鉴的经验。
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