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发明名称
Jack
摘要
申请公布号
US2490046(A)
申请公布日期
1949.12.06
申请号
US19450634125
申请日期
1945.12.10
申请人
GENIER JOHN D;RUCKART JOHN L
发明人
GENIER JOHN D.;RUCKART JOHN L.
分类号
B21D1/00
主分类号
B21D1/00
代理机构
代理人
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