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Keywords from Image Description:
MINER IS HOOKED UP TO BREATH MACHINE TO MONITOR HOW MUCH LUNG CAPACITY HE HAS WHILE WALKING ON TREADMILL DURING... NARA . Scope and content General notes Local identifier DA Environmental Protection Agency NARAAuthor Corn Jack Photographer File MINERISHOOKEDUPTOABREATHMACHINETOMONITORHOWMUCHLUNGCAPACITYHEHASWHILEWALKINGONATREADMILLDURING