VincentWeiyunfu 发表于 2009-3-28 01:39:30

ITU-T Recommendation K.20 分享

K.20-200307-I分享

INTERNATIONALTELECOMMUNICATIONUNION
K.20(07/2003)

TELECOMMUNICATIONSTANDARDIZATIONSECTOROFITU

SERIESK:PROTECTIONAGAINSTINTERFERENCE
Resistibilityoftelecommunicationequipmentinstalledinatelecommunicationscentretoovervoltagesandvercurrents

dx501 发表于 2009-8-17 19:23:23

感谢楼主的贡献啊!

感谢楼主的贡献啊!

sobsob 发表于 2009-8-23 11:00:21

谢谢楼主···有k.36或k.12么···小弟也需要哈

simple_by 发表于 2009-8-31 10:17:35

谢谢LZ

贺为标 发表于 2020-6-12 19:04:18

谢谢楼主···有k.36或k.12么···小弟也需要哈

贺为标 发表于 2020-6-12 19:04:29

谢谢楼主···有k.36或k.12么···小弟也需要哈
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