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Bernard Hines gets some practical experience undercutting a generator commutator

UNDERCUTTING

CD 2478002 E&MP10.024

Dynamos

no date

Apprentice Bernard Hines gets some practical experience undercutting a generator commutator at the Gary, Indiana, sheet and tin mill of Carnegie-Illinois Steel Corporation, United States Steel Corporation subsidiary. 


Original Caption by Science Service
Carnegie-Illinois Steel Corporation



National Museum of American History

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