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经营范围
发明名称
Drill bit and fastening means
摘要
申请公布号
US3148741(A)
申请公布日期
1964.09.15
申请号
US19600074533
申请日期
1960.12.08
申请人
THE TIMKEN ROLLER BEARING COMPANY
发明人
HOLSING ROBERT H.
分类号
E21B10/36;E21B10/62;E21B10/633
主分类号
E21B10/36
代理机构
代理人
主权项
地址
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