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发明名称
Gage maintaining arrangement for drill bit cutters
摘要
申请公布号
US3186500(A)
申请公布日期
1965.06.01
申请号
US19610088218
申请日期
1961.02.09
申请人
REED ROLLER BIT COMPANY
发明人
BOICE ELVIN G.
分类号
E21B10/52
主分类号
E21B10/52
代理机构
代理人
主权项
地址
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