换热管焊接后须做直径为（ ）倍的通球试验。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24912' and id < 2125259 and id<>'2125259' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24912' and id > 2125259 and id<>'2125259' order by id asc limit 5