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发明名称
Method and machine for producing twist drills
摘要
申请公布号
US2985041(A)
申请公布日期
1961.05.23
申请号
US19530354160
申请日期
1953.05.11
申请人
HAYDEN TWIST DRILL COMPANY
发明人
HAYDEN HOWARD A.
分类号
B21H3/00
主分类号
B21H3/00
代理机构
代理人
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地址
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