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发明名称
Dispositif pour résoudre rapidement et avec une approximation très élevée les calculs logarithmiques
摘要
申请公布号
FR948937(A)
申请公布日期
1949.08.16
申请号
FRD948937
申请日期
1947.04.29
申请人
发明人
BETTERELLI GIUSEPPE
分类号
G06G1/10
主分类号
G06G1/10
代理机构
代理人
主权项
地址
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