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摘要
申请公布号
US2595949(A)
申请公布日期
1952.05.06
申请号
US19480029342
申请日期
1948.05.26
申请人
E. I. DU PONT DE NEMOURS & COMPANY
发明人
KARLSSON CARL E. E.
分类号
H01H29/20
主分类号
H01H29/20
代理机构
代理人
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