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US Nov Heyns Stead pic. physics en Patent Drawing Truvelo Neostead PumpGun Details magazine de Patentzeichnung Truvelo Neostead Flinte Detailzeichnung Magazin espacenet DB EPODOC IDX US QPN US US Patent Office STEAD HEYNS ZA NEOPHYTOU ANTHONY ZA Weapon patents PDUSGov PDUSpatent
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