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Model of a Lifting Screw
Petrus van der Loo, 1857, demonstration model, NG-MC-564-1
Model of the Spiral Staircase of a…
Petrus van der Loo, 1834, demonstration model, NG-MC-830
Petrus van der Loo, 1857, demonstration model, NG-MC-564-1
Petrus van der Loo, 1834, demonstration model, NG-MC-830