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发明名称
Sheet-metal folder
摘要
申请公布号
US1781180(A)
申请公布日期
1930.11.11
申请号
US19280302196
申请日期
1928.08.27
申请人
JARECKI FRANK J
发明人
JARECKI FRANK J.
分类号
B21D39/02
主分类号
B21D39/02
代理机构
代理人
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