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经营范围
发明名称
Process of concentrating ore by flotation
摘要
申请公布号
US1934440(A)
申请公布日期
1933.11.07
申请号
US19270168465
申请日期
1927.02.15
申请人
THE BARRETT COMPANY
发明人
MOSES FREDERICK G.;HESS RAYMOND W.;PERKINS ROBERT L.
分类号
B03D1/012
主分类号
B03D1/012
代理机构
代理人
主权项
地址
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