Stråling og ledningsevne: Edderfuglefjer bruges til at lave edderdunsdyn, fordi de tilbageholder en stor mængde luft og forhindrer konvektion. Anonym illustration fra 1925. Privat samling.(Radiation and conductibility: Eider feathers are used to make eiderdowns because they retain a large amount of air and prevent convection. Anonymous illustration from 1925. Private collection.)Anonymous Anonymous |
€ 122.69
Enthält 25% MwSt.
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Udateret · Engraving
· Billed-ID: 918233
Private Collection / Bridgeman Images |
0 Anmeldelser |