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jackhammer [jackhammers]▼(portable percussive drill device)noun[UK: ˈdʒæk.ˌhæ.mə(r)] [US: ˈdʒæk.ˌhæ.mər]
supercharger [superchargers]▼(inlet air compressor for an internal combustion engine)noun[UK: ˈsuː.pə.tʃɑː.dʒə(r)] [US: ˈsuː.pə.tʃɑːr.dʒər]
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