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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| YD/T 907-2011 |
Arrangement of digits, letters and symbols on telephones and other devices that can be used for gaining access to a telephone network 接入电话网的电话机和其它设备上用于发号的数字、字母和符号规定 |
China Telecommunication
Standards Arrangement digits, letters |
 English PDF |
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