Three-inch A.A. cartridge cases. The art of metal drawing is employed to turn brass discs punched from rolled sheets into long tubular cartridge case to carry the powder charges that send explosive shells up to meet enemy aircraft. The first operation is performed by a press which forms the flat disc into cups
Summary
Picryl description: Public domain image of an industrial building, factory, workshop, workers, 20th century, free to use, no copyright restrictions.
Tags
Date
01/01/1942
Contributors
Palmer, Alfred T., photographer
United States. Office for Emergency Management.
Location
Source
Library of Congress
Copyright info
Public Domain