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Exact Drawing made with Camera Obscura of Horizontal Boring Machine by Jan Verbruggen in Woolwich Royal Brass Foundry approx 1778 (drawing 47 out of set of 50 drawings) Date 29 January 2013, 22:17:16 Source Family Archive Semeijns de Vries van Doesburgh Author Pieter Verbruggen
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| current | 10:48, 19 September 2023 | | 1,024 × 745 (189 KB) | Isidore (talk | contribs) |
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