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发明名称
Drill extension
摘要
申请公布号
US2711199(A)
申请公布日期
1955.06.21
申请号
US19520293414
申请日期
1952.06.13
申请人
SALSBERG OSCAR B
发明人
SALSBERG OSCAR B.
分类号
B27C3/08
主分类号
B27C3/08
代理机构
代理人
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