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Penetration: (iron thickness}
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42mm (Fuji # 100, lead foil intensifying screen PbO.03, 5 min.) 56mm (Fuji # 100, metallic fluorescent inten- sifying screen SMP-308, 5 min.) 82mm (Fuji # 400 , metallic fluorescent inten- sifying screen SMP-308, 5 min.) Film density D= 1.5
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