| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| YD/T 562-1992 | English | 359 |
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Days<=3
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General technical requirements and test methods For manual toll telephone switching equipment
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YD/T 562-1992
| Obsolete |
YD/T 562-1992
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