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发明名称
Material working apparatus
摘要
申请公布号
US2289252(A)
申请公布日期
1942.07.07
申请号
US19410380757
申请日期
1941.02.27
申请人
WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
DORWEILER CHARLES
分类号
B21D45/00
主分类号
B21D45/00
代理机构
代理人
主权项
地址
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