US2337118A US360160A US36016040A US2337118A US 2337118 A US2337118 A US 2337118A US 360160 A US360160 A US 360160A US 36016040 A US36016040 A US 36016040A US 2337118 A US2337118 A US 2337118A Authority US United States Prior art keywords flotation minerals ton cationic acid Prior art date 1940 10 07 Legal status (The legal status is an assumption and is not a legal.Send Message Get Price
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Zhengzhou High-tech Zone, China