Huron Portland Cement Company, coupling and gear-reduction guards on screw conveyors
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[Huron Portland Cement Company, ...
Author
Williams, M. L.Arthur Lakes Library
Russell L. and Lyn Wood Mining History Archive
United States. Bureau of Mines
Date
1948-11Keywords
Huron Portland Cement CompanyIndustrial minerals
Machinery and equipment
Quarries and quarrying
Scenes, interior