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helverson e h writer of accompanying material

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Plein dredge in course of construction; Sivertsen gasoline dredge No. 1, 1 1/4-ft. Buckets

Plein dredge in course of construction; Sivertsen gasoline dredge No. ...

Picryl description: Public domain image of an industrial equipment, workshop, assembly line, factory, power engine, 19th-20th century, free to use, no copyright restrictions.