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文档 ISO IEC 13872 2003 Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Specification, functional model and information flows — Call

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ISO IEC 13872 2003 Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Specification, functional model and information flows — Call 第 1 页 ISO IEC 13872 2003 Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Specification, functional model and information flows — Call 第 2 页 ISO IEC 13872 2003 Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network — Specification, functional model and information flows — Call 第 3 页
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