在双母线接线中倒母线时，应采取措施确保（  ）接通，以满足等电位的条件。  

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69483' and id < 4500438 and id<>'4500438' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69483' and id > 4500438 and id<>'4500438' order by id asc limit 5