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cc523pate 发表于 2018-10-14 18:53:34

ISO/IEC 15049:1997(E) Information technology -- Telecommunications

ISO/IEC 15049:1997(E) Information technology -- Telecommunications and information Exchange between systems -- Private
Integrated Services Network -- Specification, functional model and information flows -- Advice of charge supplementary services

admin 发表于 2018-10-15 10:01:02

谢谢您的分享，金币已奖励!

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