U.S. Air Force Senior Airman Benjamin Mathias, 35th Civil Engineer Squadron heating ventilation and air conditioning journeyman, turns on a siphoning machine at Misawa Air Base, Japan, May 5, 2015. The machine features a bore and brush which enters numerous coils of a chiller, cleaning it out by rapidly spinning while removing sediment and scale built up during the period when the unit is off during non-cooling seasons. (U.S. Air Force photo by Senior Airman Patrick S. Ciccarone/Released)
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