Synthaprufe air raid shelters, WW2
Synthaprufe air raid shelters -- operating pedal-driven air filtration plant, 125 cubic feet per minute capacity for 50 persons (top), first stages of construction of a shelter (bottom)
Picture No
12348309
Media ID
48410653
Size
2488px x 7356px
(23.7MB)
Credit
Mary Evans Picture Library
Source
Photographs in The PD Review, July 1939
Date
1939
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Concrete Cylinder Filtration Operating Pedal Shelters
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