换热器中折流板有正三角形排列、正方形排列及圆环形排列。 （ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24910' and id < 2125218 and id<>'2125218' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24910' and id > 2125218 and id<>'2125218' order by id asc limit 5