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US2287748A
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Apparatus for separating solids of different gravities
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US2287747A
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Apparatus for separating solids of different gravities
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US2205432A
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Method and apparatus for separating solids of different gravities
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US2199091A
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Method and apparatus for separating solids of different gravities
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US2109139A
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Lowering apparatus
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Concave spiral separator
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Mountainside car transportation system
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Car dumping apparatus
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Separator
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Separator
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Separator
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Mechanical separator
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Silo runway
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Flexible lowering apparatus
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Combined lowering and withdrawal chute
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Bag loading chute
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Apparatus for lowering coal and the like
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Car-loading chute
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US1839494A
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Discharge chute
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US1863027A
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Separator
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