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发明名称
Copper-extraction process
摘要
申请公布号
US1798255(A)
申请公布日期
1931.03.31
申请号
US19270159450
申请日期
1927.01.06
申请人
GREENAWALT WILLIAM E
发明人
GREENAWALT WILLIAM E.
分类号
C22B15/00
主分类号
C22B15/00
代理机构
代理人
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