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发明名称
Drill bit
摘要
申请公布号
GB1173325(A)
申请公布日期
1969.12.10
申请号
GB19660056370
申请日期
1966.12.16
申请人
REED INTERNATIONAL, INC.
发明人
分类号
E21B10/10;E21B10/52
主分类号
E21B10/10
代理机构
代理人
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地址
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