Technical illlustration of 19th century steam dredging machine.A succession of strong iron buckets on an endless chain moves along a frame.The lower end of the frame is vertically adjusted to the required depth. The buckets raise the material to be dredged and deposit it to a punt behind the dredger | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Terry, Sheila |
Bildgröße: | 5048 px × 3500 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |