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 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Terry, Sheila |
Taille de l’image : | 5048 px × 3500 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |