US2672237A - Ore concentrator - Google Patents
US2672237A US227145A US22714551A US2672237A US 2672237 A US2672237 A US 2672237A US 227145 A US227145 A US 227145A US 22714551 A US22714551 A US 22714551A US 2672237 A US2672237 A US 2672237A Authority US United States Prior art keywords valve plates receptacle container vanes Prior art date 1951-05-19 Legal status (The legal status is an assumption and is not a …
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