避雷器的残压指的是,其通过波形为( )μs的额定冲击放电电流时,在电阻上产生的电压值。
发布时间:2026-04-29
A.2.6/40
B.1.2/50
C.8/20
D.250/2500
试卷相关题目
-
SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69525' and id < 4504402 and id<>'4504402' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69525' and id > 4504402 and id<>'4504402' order by id asc limit 5
湘公网安备:43011102000856号 
