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发明名称
Zeichengeraet fuer die Herstellung von Logarithmenpapier
摘要
申请公布号
DE826200(C)
申请公布日期
1951.12.27
申请号
DE1949F000192
申请日期
1949.11.01
申请人
DR. ERICH FRANK
发明人
FRANK DR. ERICH
分类号
B43L13/20
主分类号
B43L13/20
代理机构
代理人
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