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摘要
申请公布号
US2085813(A)
申请公布日期
1937.07.06
申请号
US19360080249
申请日期
1936.05.18
申请人
MARTIN FREDERICK J
发明人
MARTIN FREDERICK J.
分类号
G09F7/02
主分类号
G09F7/02
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