当管程介质温度较低而壳程温度较髙时，则壳程受拉，管程受压。 （ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24912' and id < 2125287 and id<>'2125287' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24912' and id > 2125287 and id<>'2125287' order by id asc limit 5