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经营范围
发明名称
Mining machine
摘要
申请公布号
US1867528(A)
申请公布日期
1932.07.12
申请号
US19300444679
申请日期
1930.04.16
申请人
GOODMAN MANUFACTURING COMPANY
发明人
ESSELTINE ALFRED B.
分类号
E21C25/68
主分类号
E21C25/68
代理机构
代理人
主权项
地址
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