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发明名称
Deflecting tool
摘要
申请公布号
US2643859(A)
申请公布日期
1953.06.30
申请号
US19490126730
申请日期
1949.11.12
申请人
EASTMAN BROWN GUY
发明人
BROWN GUY EASTMAN
分类号
E21B7/06;E21B7/08
主分类号
E21B7/06
代理机构
代理人
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地址
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