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摘要
申请公布号
US1883271(A)
申请公布日期
1932.10.18
申请号
US19300451148
申请日期
1930.05.09
申请人
YOUNG ROBERT S;PAUL DEVLIN
发明人
YOUNG ROBERT S.;DEVLIN PAUL
分类号
B42F7/00;B42F9/00
主分类号
B42F7/00
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