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发明名称
Apparatus and method for producing lock washers
摘要
申请公布号
US2295583(A)
申请公布日期
1942.09.15
申请号
US19400344223
申请日期
1940.07.06
申请人
ERNST JORDAN
发明人
JORDAN ERNST
分类号
B21D53/20
主分类号
B21D53/20
代理机构
代理人
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