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发明名称
Diamond set core bit
摘要
申请公布号
US2612348(A)
申请公布日期
1952.09.30
申请号
US19490115618
申请日期
1949.09.14
申请人
WHEEL TRUEING TOOL COMPANY
发明人
CATALLO LEO
分类号
E21B10/48
主分类号
E21B10/48
代理机构
代理人
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