U.S. Air Force Staff Sgt. Samuel Williams calibrates the Sperry Reflectoscope using a known sample. The device is capable of detecting sub-surface flaws in metals, plastics and other materials used in the construction of aerospace equipment. (U.S. Air Force courtesy photo)
RMID:Image ID:PF1KDP
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AB Forces News Collection / Alamy Stock PhotoImage ID:
PF1KDPFile size:
5.7 MB (267.5 KB Compressed download)Releases:
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1296 x 1536 px | 21.9 x 26 cm | 8.6 x 10.2 inches | 150dpiDate taken:
5 February 2016More information:
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