（） 化工设备的代号是E。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24904' and id < 2124950 and id<>'2124950' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24904' and id > 2124950 and id<>'2124950' order by id asc limit 5