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 Date: 2012-05-09 15:28:45Physics Military science Counterweight Bellifortis Sling Siege Elevator Truss Beam Structural system Medieval artillery Trebuchet |
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Date: 2012-05-09 15:28:45Physics Military science Counterweight Bellifortis Sling Siege Elevator Truss Beam Structural system Medieval artillery Trebuchet |
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This is an extract from: Dumbarton Oaks Papers, No. 54 Editor: Alice-Mary Talbot Published by