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摘要
申请公布号
US2110296(A)
申请公布日期
1938.03.08
申请号
US19340741818
申请日期
1934.08.28
申请人
GREENLEE WILLIAM B
发明人
GREENLEE WILLIAM B.
分类号
G09F13/26
主分类号
G09F13/26
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