Spirit level. This device is used in construction to ensure that layers are perfectly horizontal and vertical. The bubbles in the fluid-filled tubes remain stationary between two marks when the level is correct | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Rapson, Paul |
Bildgröße: | 5150 px × 3433 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |