Ore-washing apparatus
作者： Roy B Lindsey
DOI:
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摘要:
lens.org 参考文章(7)
Daniel B Cave, Placer-gold concentrator ,(1918)
Harry W Newton, Classifying and washing apparatus ,(1925)
Edgar B. Hoover, Continuous-operating ore separator ,(1922)
Frank Tucker, Placer mining machine ,(1942)
Lem S. Overpeck, Continuous cleanup sluice box and concentrator ,(1949)
Sr Ernest Alfred Willner, Placer gold concentrator and amalgamator ,(1936)
Moussette Oliver J, SCREEN ATTACHMENT FOR MILLS. ,(1916)