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经营范围
发明名称
Coring apparatus
摘要
申请公布号
US2634956(A)
申请公布日期
1953.04.14
申请号
US19510214357
申请日期
1951.03.07
申请人
REED ROLLER BIT COMPANY
发明人
STOKES JOHN C.
分类号
E21B10/06
主分类号
E21B10/06
代理机构
代理人
主权项
地址
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