| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| JJF 1272-1990 | English | 319 |
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Days<=3
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O.T.N. of Free-field Sound Pressure Primary Standard in Air
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JJF 1272-1990
| Obsolete |
JJF 1272-1990
|