| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| SJ 20227-1993 | English | 319 |
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Days<=3
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Verification regulation of model QF 3370 frequency counter
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SJ 20227-1993
| Obsolete |
SJ 20227-1993
|