clock instrument
clock instrument, Total:2 items.
The international standard classification for "clock instrument" includes: .
The Chinese standard classification for "clock instrument" includes: .
National Metrological Verification Regulations of the People's Republic of China
- JJG(轻工) 79-1991 Calibration rules for watch instrument calibrator
- JJG(轻工) 83-1991 Verification Regulations for BMP-2 Quartz Clock Instrument Accuracy Calibrator
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