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经营范围
发明名称
Coring device
摘要
申请公布号
US2541785(A)
申请公布日期
1951.02.13
申请号
US19460692165
申请日期
1946.08.22
申请人
THE TEXAS COMPANY
发明人
SMITH DONALD M.
分类号
E21B25/08
主分类号
E21B25/08
代理机构
代理人
主权项
地址
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