Hydraulisk: formel til beregning af vandstrømmen og diagrammer over de forskellige huller og overløb, der tillader vandet at strømme. Anonym illustration fra 1925. Privat samling.(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.)Anonymous Anonymous | 
                            
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                             € 127.59 
                            
                                Enthält 25% MwSt.
                             
                            
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                                Udateret                                                                 ·  Engraving
                                                                 ·  Billed-ID: 915739
                                   Private Collection / Bridgeman Images  | 
                        
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