Magnetising a needle. Boy holding a bar magnet and drawing a large sewing needle along the bottom of the magnet to magnetize the needle. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / DK IMAGES |
Bildgröße: | 3533 px × 2968 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |