塔完成传质、传热过程的主要部件是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24908' and id < 2125107 and id<>'2125107' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24908' and id > 2125107 and id<>'2125107' order by id asc limit 5