实体的平衡:重心移动在吊桥建造中的应用(吊桥)。1925年的匿名插图。私人收藏。(Balance of solids: application of the movement of the centre of gravity for the construction of drawbridge (drawbridge). Anonymous illustration from 1925. Private collection.)匿名匿名 |
€ 99.08
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日期不详 · Engraving
· 图片ID: 926029
Private Collection / Bridgeman Images |
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