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发明名称
Feuille à calcul
摘要
申请公布号
FR895336(A)
申请公布日期
1945.01.22
申请号
FRD895336
申请日期
1943.02.04
申请人
发明人
DUCRUY RENE-MARIE-AUGUSTIN
分类号
G06G1/14
主分类号
G06G1/14
代理机构
代理人
主权项
地址
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