水力:计算水流量的公式和允许水流动的各种孔和堰的图。1925年的匿名插图。私人收藏。(Hydraulic: formula for calculating the flow of water and diagrams of the various holes and weirs allowing the water to flow. Anonymous illustration from 1925. Private collection.)匿名匿名 |
€ 99.08
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日期不详 · Engraving
· 图片ID: 915739
Private Collection / Bridgeman Images |
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