compressed-air jack

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• air jack — /ˈɛə dʒæk/ (say air jak) noun a device, inflated with compressed air, used to raise and lower a heavy weight, especially a motor vehicle. Also, airjack …  

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• jackhammer — jack•ham•mer [[t]ˈdʒækˌhæm ər[/t]] n. bui a portable drill operated by compressed air and used to drill rock, break up pavement, etc …   From formal English to slang

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