| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| YD 509-1991 | English | 399 |
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Days<=3
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Technical requirement for networking of domestic satellite communication in time division multi-access (60Mbit/s) mode
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YD 509-1991
| Obsolete |
YD 509-1991
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