引用第3楼caballo3157于2007-07-16 07:47发表的 :
比较2.4.3& E7 g/ w5 \ H* G3 @2 R
2.4.3
DIRECTLY CONNECTED TO THE MAINS, e' p: j7 x3 K- g
electrical connection with the MAINS in such a way that a connection to either pole of the MAINS
causes in that connection a permanent current equal to or greater than 9 A, protective devices0 y- ~# F3 N5 c
.......
引用第5楼pwong03492于2007-07-16 15:13发表的 :
* _; i- h! p. H$ S6 t9 C
CA兄, 关于这两名词的定义, 还是不能理解. 能否具体说明一下? 比如可以举个例子吗?
欢迎光临 安规网 (http://bbs.angui.org/) | Powered by Discuz! X3.2 |