浮头式换热器管板一侧与壳体固定，另一侧在壳体内自由浮动，故不存在温差应力。 （ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24911' and id < 2125255 and id<>'2125255' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24911' and id > 2125255 and id<>'2125255' order by id asc limit 5