K[1].20-200307-I分享
INTERNATIONALTELECOMMUNICATIONUNION
K.20(07/2003)
TELECOMMUNICATIONSTANDARDIZATIONSECTOROFITU
SERIESK:PROTECTIONAGAINSTINTERFERENCE
Resistibilityoftelecommunicationequipmentinstalledinatelecommunicationscentretoovervoltagesandvercurrents
谢谢LZ
谢谢楼主···有k.36或k.12么···小弟也需要哈
感谢楼主的贡献啊!