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Keywords from Image Description:
WORKMEN SANDBLAST WITH BLACK BEAUTY SLAG FROM STEEL MILLS. SLAG IS CONSIDERED TO BE LESS DAMAGING TO THE WORKMEN'S... NARA . Scope and content General notes Local identifier DA Environmental Protection Agency NARAAuthor Messina John Photographer File WORKMENSANDBLASTWITH BLACKBEAUTY SLAGFROMSTEELMILLS SLAGISCONSIDEREDTOBELESSDAMAGINGTOTHEWORKMEN'S