采用DL/T476规约实现远程浏览功能时，通信端口为（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29465' and id < 2399194 and id<>'2399194' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29465' and id > 2399194 and id<>'2399194' order by id asc limit 5