电焊机应有漏电保护节能器，双线到位且不得超过（）m。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='25762' and id < 2165855 and id<>'2165855' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25762' and id > 2165855 and id<>'2165855' order by id asc limit 5