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Senior Airman Seth Bayles, a 386th Expeditionary Aircraft Maintenance Squadron aerospace ground equipment journeyman, sprays a dry lubricant on a jack tester at an undisclosed location in Southwest Asia, May 7, 2017. AGE members use the jack tester to test the relief valve on a 30-ton aircraft jack, ensuring its operational capability to reduce safety hazards to aircraft and personnel.(U.S. Air Force photo/TSgt Jonathan Hehnly)
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