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YD 5063-1998.Telecommunication Cable Tunnel Atlas.1通信电缆通道的结构1.0.1 通信电缆通道的适用范围按照技...

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YD 5035-1997.Temporary Specification for Engineering Acceptance of Trunked Commu...

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YD 5036-1997.Interim Provisions on Intelligent Network Engineering Design.1总则1.0...

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YD 5039-2009.Provisional Specifications on Environment Protection for Engineerin...

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YD 5074-1998.Temporary Specifcation on Engineering Design for Hgh Speed Radio Pa...

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YD 5073-2005.Supervision Specification for Telecommunication Private Promisc.1总则...

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