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发明名称
Boring type miner
摘要
申请公布号
US2862700(A)
申请公布日期
1958.12.02
申请号
US19570652042
申请日期
1957.04.10
申请人
GOODMAN MANUFACTURING COMPANY
发明人
GONSKI JOSEPH
分类号
E21C27/12
主分类号
E21C27/12
代理机构
代理人
主权项
地址
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