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发明名称
Drill bit
摘要
申请公布号
US3283837(A)
申请公布日期
1966.11.08
申请号
US19650429534
申请日期
1965.02.01
申请人
ACME FISHING TOOL COMPANY
发明人
MCKAIN WALTER P.
分类号
E21B10/36
主分类号
E21B10/36
代理机构
代理人
主权项
地址
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