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发明名称
Method of making a structural unit
摘要
申请公布号
US2451725(A)
申请公布日期
1948.10.19
申请号
US19450607605
申请日期
1945.07.28
申请人
JACOB POSTER
发明人
FRANKLIN ALBERT W.
分类号
B21D22/02
主分类号
B21D22/02
代理机构
代理人
主权项
地址
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