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发明名称
Mining machine
摘要
申请公布号
US2031376(A)
申请公布日期
1936.02.18
申请号
US19300441085
申请日期
1930.04.02
申请人
GOODMAN MANUFACTURING COMPANY
发明人
LINDGREN FRANK A.
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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