PMEL Airmen keep it precise
U.S. Air Force Airman Thomas Lewis, 20th Component Maintenance Squadron test, measurement and diagnostic equipment technician, checks the flatness of a micrometer using a monochromatic light, Shaw Air Force Base, S.C., Feb. 25, 2014. By using only one color of light along with an optical flat, Lewis determined how flat the surface area of the micrometer is down to a microscopic level. (U.S. Air Force photo by Airman 1st Class Jensen Stidham/Released)
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Airman st Class Jensen StidhamReleased
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