用钳表测量电流时，尽量将导线置于钳口铁芯中间，以减少测量误差。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27215' and id < 2260427 and id<>'2260427' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27215' and id > 2260427 and id<>'2260427' order by id asc limit 5