Gauge blocks are aligned in a box at the 3rd Maintenance Squadron Precision Measurement Equipment Laboratory at Joint Base Elmendorf-Richardson, Alaska, Oct. 23, 2017. Gauge blocks are standards JBER uses to establish precision lengths for micrometers and dial calipers. ( Air Force photo/Senior Airman Curt Beach)

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Size: 2100px × 1500px
Photo credit: © AB Forces News Collection / Alamy / Afripics
License: Licensed
Model Released: No

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