电动工具应由具备证件合格的电工定期检查及维修。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30397' and id < 2457239 and id<>'2457239' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30397' and id > 2457239 and id<>'2457239' order by id asc limit 5