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发明名称
Dry placer machine
摘要
申请公布号
US1795017(A)
申请公布日期
1931.03.03
申请号
US19290379735
申请日期
1929.07.20
申请人
FISHER CHARLES E
发明人
FISHER CHARLES E.
分类号
主分类号
代理机构
代理人
主权项
地址
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