"ISDN, " CNS Standards List

CNS 14724 2018 Edition
B-ISDN user part - Call priority
寬頻整體服務數位網路使用者部—呼叫優先權

CNS 15517 2017 Edition
Preamble and General Structure of the Series Standards for the Integrated Services Digital Network (ISDN)
普通預拌乾混水泥砂漿料

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