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发明名称
Method of making die spotting devices
摘要
申请公布号
US2284929(A)
申请公布日期
1942.06.02
申请号
US19400359413
申请日期
1940.10.02
申请人
STEWART ALEXANDER P
发明人
STEWART ALEXANDER P.
分类号
B21D37/20
主分类号
B21D37/20
代理机构
代理人
主权项
地址
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