| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| TB/T 2029-1988 | English | 559 |
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Days<=4
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(Rail long-distance telephone switching equipment artificial long-distance connection station)
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TB/T 2029-1988
| Obsolete |
TB/T 2029-1988
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