| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| JJF 1797-2020 | English | 439 |
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Days<=4
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Calibration Specification for Measuring Instruments for Overall Speech Characteristics of Intercom Systems
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JJF 1797-2020
| Valid |
JJF 1797-2020
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