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CMCs General Physics (2)
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Angle by circle dividers (2)
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United Kingdom, NPL (National Physical Laboratory)
Complete CMCs in Length for United Kingdom (.PDF file)
Angle by circle dividers. Optical polygon: face angle, 0 ° to 360 °
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ": 0.11
Back to back calibration
Faces: up to 12 excluding 7 and 11
Approved on 30 January 2009
Internal NMI service identifier: 31
 
Angle by circle dividers. Indexing table: index angle, 0 ° to 360 °
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in ": 0.04
Back to back calibration
Interval: 30 °
Approved on 30 January 2009
Internal NMI service identifier: 32