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perforation [perforations]▼◼◼◼noun[UK: ˌpɜː.fə.ˈreɪʃ.n̩] [US: ˌpər.fə.ˈreɪʃ.n̩]
perforating▼noun[UK: ˈpɜː.fə.reɪt.ɪŋ] [US: ˈpɝː.fə.reɪt.ɪŋ]
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