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that performs by the high pressure of air from an air compressor. ... The third kind 
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nonprofit... [DOC] [TLE] Air-Powered Destruction - How Jackhammers Work | HowStuffWorks [PAR] Air-Powered Destruction - Jackhammers offer incredible power when it ... A 
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some ... off and strike the user or another worker;; Using a wrench if its jaws are 
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Question: It's what is done to air so it can power a jackhammer
Answer: Compressed