当机件对称，且在图上恰好有一轮廓线与对称线重合时，采用半剖视有矛盾，此时可采 用（）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='24885' and id < 2124094 and id<>'2124094' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24885' and id > 2124094 and id<>'2124094' order by id asc limit 5