直径较小的换热器，为了增加紧凑性，换热管在管板上的排列方式常采用 »

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24911' and id < 2125228 and id<>'2125228' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24911' and id > 2125228 and id<>'2125228' order by id asc limit 5