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YD/T 2789.1-2015 数字蜂窝移动通信网分组数据业务计费系统计费性能技术要求和检测方法第1部分:TD-SCDMA/WCDMA/VGSM 网络

YD/T 2789.1-2015.Technical requirements and testing methods for billingperforman...

YD/T 2789.2-2015.Technical requirements and testing methods for billingperforman...

TB/T 3294-2013.Special vacuum demoulding machine for the CRTS II track slab.1范围T...

TB/T 3296-2013.Box-beam girder-erecting machine of high speed railway.1范围TB/T 32...

TB/T 3298-2013.Prestressed concrete broad sleeper for ballasted track.1范围TB/T 32...

TB/T 3299-2013.Prestressed concrete bridge sleeper for ballasted track of high-s...

TB/T 3300-2013.Prestressed concrete sleeper for ballasted track of high-speed ra...

TB/T 3302-2013.Technical specification for laying of high speed turnouts for sla...

TB/T 3306-2013.Technical specification for laying of high speed turnouts for bal...

YD/T 2620.2-2015.General technical requirements for evolved mobile packet core (...

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