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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 11589-2011 |
International user classes of service in, and categories of access to, public data networks and integrated services digital networks(ISDNs) 公用数据网和综合业务数字网(ISDN)的国际用户业务类别和接入种类 |
China National Standards International user classes |
 English PDF |
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