| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| YD 5004-1994 | English | 1949 |
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Code for design digital microwave relay telecommunication system (PDH part) engineering
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YD 5004-1994
| Obsolete |
YD 5004-1994
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