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发明名称
Mining machne
摘要
申请公布号
US1938850(A)
申请公布日期
1933.12.12
申请号
US19290402505
申请日期
1929.10.25
申请人
GOODMAN MANUFACTURING COMPANY
发明人
MCCULLOUGH WILLIAM T.
分类号
E21C31/00
主分类号
E21C31/00
代理机构
代理人
主权项
地址
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