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| channel structure; interface structure; ISDN user-network interface structure | |||
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structure d'interface RNIS usager-reseau : 1 短语, 1 学科 |
| 电信 | 1 |
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| |||
| channel structure; interface structure; ISDN user-network interface structure | |||
|
structure d'interface RNIS usager-reseau : 1 短语, 1 学科 |
| 电信 | 1 |