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发明名称
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摘要
申请公布号
US2582295(A)
申请公布日期
1952.01.15
申请号
US19470738659
申请日期
1947.04.01
申请人
STOFFEL HANS F
发明人
STOFFEL HANS F.
分类号
G09F3/14
主分类号
G09F3/14
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