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发明名称
Alloy steel
摘要
申请公布号
US1998954(A)
申请公布日期
1935.04.23
申请号
US19340758754
申请日期
1934.12.22
申请人
THE CLEVELAND TWIST DRILL COMPANY
发明人
EMMONS JOSEPH V.
分类号
C22C38/24;C22C38/30
主分类号
C22C38/24
代理机构
代理人
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地址
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