Invention or Discovery: Rotary Cement Kilns In U.S.
Invention: First rotary cement kilns in United_StatesDate: 1889
Inventor:
Birthplace: Coplay, PA
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| Invention or Discovery: Rotary Cement Kilns In U.S.Invention: First rotary cement kilns in United_StatesDate: 1889 Inventor: Birthplace: Coplay, PA
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