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摘要
申请公布号
US2187113(A)
申请公布日期
1940.01.16
申请号
US19380204363
申请日期
1938.04.26
申请人
EHRENZWEIG SEYMOUR S
发明人
EHRENZWEIG SEYMOUR S.
分类号
B42F15/00
主分类号
B42F15/00
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