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发明名称
Drum swager
摘要
申请公布号
US2379046(A)
申请公布日期
1945.06.26
申请号
US19430471197
申请日期
1943.01.02
申请人
SPAHR WILLIAM F
发明人
SPAHR WILLIAM F.
分类号
B21D17/02
主分类号
B21D17/02
代理机构
代理人
主权项
地址
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