Bitumen. Bitumen is a brown to black semi-solid highly viscous form of petroleum. It is present in some natural deposits,such as asphalt lakes,but can also be a product of refining. It's primary use is in road-surfacing and roofing material where it is mixed with gravel | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / De Schwanberg, Victor |
Bildgröße: | 5014 px × 3510 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |