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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| JJG 71-2005 |
Verification Regulation of Standard Metallic Scale (Grade Ⅲ) 三等标准金属线纹尺检定规程 |
China Metrological
Standards Verification Regulation Ⅲ |
 English PDF |
| JJG 645-1990 |
Verification Regulation of Ⅲ-mode Ultrasonic Flaw Detector for Rail 三型钢轨探伤仪检定规程 |
China Metrological
Standards Verification Regulation Ⅲ |
English PDF |
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