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发明名称
Mining machine
摘要
申请公布号
US1801239(A)
申请公布日期
1931.04.14
申请号
US19250003487
申请日期
1925.01.19
申请人
SULLIVAN MACHINERY COMPANY
发明人
OSGOOD CHARLES F.
分类号
E21C29/10
主分类号
E21C29/10
代理机构
代理人
主权项
地址
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