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摘要
申请公布号
US2579260(A)
申请公布日期
1951.12.18
申请号
US19450637419
申请日期
1945.12.27
申请人
FRANCIS HORGAN WILLIAM
发明人
HORGAN WILLIAM FRANCIS
分类号
G04C23/34
主分类号
G04C23/34
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