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经营范围
发明名称
Concentration of ores and other minerals by the sink and float process
摘要
申请公布号
US2206574(A)
申请公布日期
1940.07.02
申请号
US19380233745
申请日期
1938.10.07
申请人
ANDREW PEARSON
发明人
PEARSON ANDREW
分类号
B03B13/00
主分类号
B03B13/00
代理机构
代理人
主权项
地址
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