()的电机，在通电前，必须先做各绕组的绝缘电阻检査，合格后才可通电。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27221' and id < 2260196 and id<>'2260196' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27221' and id > 2260196 and id<>'2260196' order by id asc limit 5