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发明名称
Flotation process
摘要
申请公布号
US2132902(A)
申请公布日期
1938.10.11
申请号
US19340730551
申请日期
1934.06.14
申请人
E. I. DU PONT DE NEMOURS & COMPANY
发明人
LENHER SAMUEL
分类号
B03D1/01
主分类号
B03D1/01
代理机构
代理人
主权项
地址
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