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经营范围
发明名称
Boring machine
摘要
申请公布号
US1855999(A)
申请公布日期
1932.04.26
申请号
US19310541030
申请日期
1931.05.29
申请人
SHINN EDWARD T
发明人
SHINN EDWARD T.
分类号
E21B7/00
主分类号
E21B7/00
代理机构
代理人
主权项
地址
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