| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| YD/T 1056-2000 | English | 669 |
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Requirement for establishment of network of special services for different kinds of local telephone networks
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YD/T 1056-2000
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YD/T 1056-2000
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