| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| GB/T 6446-1986 | English | 199 |
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Days<=3
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Frequency weighting for the measurement of aircraft noise (D-weighting)
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GB/T 6446-1986
| Obsolete |
GB/T 6446-1986
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