A.1s/1000A B.0.01s/1000A C.0.1s/1000A D.0.1s/10A
A.1 B.2 C.3 D.4
A.設(shè)備接地點(diǎn) B.設(shè)備末屏 C.設(shè)備接地點(diǎn) D.設(shè)備外殼