检修动力电源箱的支路开关、临时电源都应加装剩余电流动作保护装置。剩余电流动作保护装置应定期（   ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69529' and id < 4505014 and id<>'4505014' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69529' and id > 4505014 and id<>'4505014' order by id asc limit 5