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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| JJG(YD)051-1999 |
(Transmission impairments tester) |
China Metrological
Standards Transmission impairments |
 English PDF |
| YD/T 588-1996 |
Basic requirement for ability of telephone online audio modem to withstand Transmission impairments 电话网上音频调制解调器承受传输损伤能力的基本要求 |
China Telecommunication
Standards Transmission impairments |
English PDF |
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