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发明名称
Mining machine
摘要
申请公布号
US2000670(A)
申请公布日期
1935.05.07
申请号
US19320597916
申请日期
1932.03.10
申请人
GOODMAN MANUFACTURING COMPANY
发明人
PRATT CHARLES A.
分类号
E21C29/00
主分类号
E21C29/00
代理机构
代理人
主权项
地址
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