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发明名称
Metal coil
摘要
申请公布号
US2275458(A)
申请公布日期
1942.03.10
申请号
US19400336186
申请日期
1940.05.20
申请人
AGNES J. REEVES GREER
发明人
NYBERG STONE
分类号
B21C47/26
主分类号
B21C47/26
代理机构
代理人
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