为了保证逆变能正常工作，变流器的逆变角不得小于（）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='33811' and id < 2707760 and id<>'2707760' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='33811' and id > 2707760 and id<>'2707760' order by id asc limit 5