日韩在线不卡免费视频一区,日韩欧美精品一区二区三区经典,日产精品码2码三码四码区,人妻无码一区二区三区免费,日本feerbbwdh少妇丰满

  • 回復(fù)
  • 收藏
  • 點(diǎn)贊
  • 分享
  • 發(fā)新帖

關(guān)于EN60335-1of version 2002的幾個(gè)問(wèn)題?

3.3.6:how to connect a protective impedance? and how is it realized to protect persons from electric shock?
11.3:how to understand the term of "Bridging of insulation"?
13.3: for the second sentence of the third paragragh, how to apply the hi-pot?
16.2: for the fifth paragragh, why are the leakage current doubled in those circumstances?Can u explain to me one by one?
19.7: for the second paragragh, how to understand it?
全部回復(fù)(3)
正序查看
倒序查看
2006-02-25 14:39
怎么沒(méi)有專業(yè)人士進(jìn)來(lái)討論一下呀?
0
回復(fù)
2006-03-08 19:15
damned all of you!
I decided never to paste any notices here.
0
回復(fù)
loglio
LV.3
4
2006-03-18 14:20
@wakingpeng
damnedallofyou!Idecidednevertopasteanynoticeshere.
你應(yīng)該進(jìn)資料共享/下載版問(wèn)
0
回復(fù)
立
即
發(fā)
帖