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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| YD/T 992-2006 |
Technical Requirements and Testing methods of Telephone Additional functions 电话机附加功能的基本技术要求及检验方法 |
China Telecommunication
Standards Function Requirements Testing |
 English PDF |
| YD/T 1438-2006 |
Function Requirements and Testing Methods for Application Level Software of Digital Mobile Station 数字移动台应用层软件功能要求和测试方法 |
China Telecommunication
Standards Function Requirements Testing |
English PDF |
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