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Three-inch A.A. cartridge cases. Between the drawing operations which process an antiaircraft cartridge case from a flat metal disc, the partly-finished cases are washed and annealed. When they move on to the next drawing operation, the surfaces are free of scale and other adhesions and the metal is soft, uniform and ductile

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safety film negatives
stow ohio
three inch
cartridge
cases
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antiaircraft
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surfaces
scale
adhesions
uniform
ductile
united states history