| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| GB/T 9412-1988 | English | 399 |
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Days<=3
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Modems for data transmission at 48 kilobits per second using 60~108 kHz group band circuits
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GB/T 9412-1988
| Obsolete |
GB/T 9412-1988
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