Nib of a ballpoint pen. Ballpoint pens have an internal chamber filled with a viscous ink that is dispensed at the tip during use by the rolling action of a small metal sphere (blue) | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Laguna Design |
Bildgröße: | 4826 px × 3650 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |