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发明名称
Method of making metal drawing dies
摘要
申请公布号
US2478171(A)
申请公布日期
1949.08.09
申请号
US19450611705
申请日期
1945.08.20
申请人
DUCTILE CHROME PROCESS CO.
发明人
MACPHERSON CARL D.
分类号
C25D7/00
主分类号
C25D7/00
代理机构
代理人
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地址
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