Emery grinders. Engraving from 1870 of grinding machine in an emery factory. Emery is a mineral that is ground to an abrasive powder for use in industry | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Bildagentur-online / Tschanz |
Bildgröße: | 4970 px × 3532 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |