Oblique projection of a post hanger, illustration. From 'Mechanical drafting' by Henry Willard Miller, Illinois University (1917). | |
Lizenzart: | Lizenzfrei |
Credit: | Science Photo Library / Photostock-Israel |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |