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Brian James, 28th Maintenance Group senior engineering and technical advisor, explains the cold spray process at Ellsworth Air Force Base, S.D., Jan. 25, 2016. Cold spray is a technology that accelerates small particles of the substrate [whatever the material is made out of] to achieve a mechanical bond upon impact restoring the part back to the original specs. Ellsworth AFB personnel have been using this technology for more than two-years and the 28th Maintenance Group is expanding the capability by building a cold spray facility, which is slated to be fully operational in May. (U.S. Air Force photo by Airman Donald C. Knechtel/Released)
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