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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| JJG 2007-2015 |
Verification Scheme of Time and Frequency Measuring Instruments 时间频率计量器具检定系统表 |
China Metrological
Standards Time measuring instruments |
 English PDF |
| QB/T 4004-2010 |
Time-measuring instruments. Photoluminescent deposits. Test methods and requirements 计时仪器 光致发光涂层 试验方法和要求 |
China Light Industry
Standards Time measuring instruments |
English PDF |
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