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发明名称
Roller cutter organization for earth boring drills
摘要
申请公布号
US2009300(A)
申请公布日期
1935.07.23
申请号
US19330697973
申请日期
1933.11.14
申请人
REED CLARENCE E
发明人
REED CLARENCE E.
分类号
E21B10/22
主分类号
E21B10/22
代理机构
代理人
主权项
地址
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