用于产生髙阶通道开销并形成完整的VC-3 / 4信号的功能块是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30264' and id < 2448280 and id<>'2448280' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30264' and id > 2448280 and id<>'2448280' order by id asc limit 5