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Portable Step and Bridge Ladder, System Porta (1874) |
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 Premi per ingrandire
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Description
The video shows a tracking shot around a CAD model of a mobile ladder, which consists of intermateable separate ladder segments. The video shows the ladder in the upright, put together state. The mechanic Paul Porta, who lived in Milan, applied this ladder for a patent in 1874. |
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DMG-Lib
Ilmenau TU
