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发明名称
Punch retainer
摘要
申请公布号
US2500420(A)
申请公布日期
1950.03.14
申请号
US19480017779
申请日期
1948.03.29
申请人
KONING JACK A
发明人
KONING JACK A.
分类号
B21D28/34
主分类号
B21D28/34
代理机构
代理人
主权项
地址
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