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发明名称
Règle à calculer
摘要
申请公布号
FR1139844(A)
申请公布日期
1957.07.05
申请号
FRD1139844
申请日期
1955.12.29
申请人
发明人
DURAND FRANCOIS
分类号
G06G1/06
主分类号
G06G1/06
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代理人
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