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发明名称
Una nueva regla de cálculo circular
摘要
申请公布号
ES40507(Y)
申请公布日期
1955.01.16
申请号
ES19070000405U
申请日期
1954.02.18
申请人
DÍAZ ATIENZA, ENRIQUE
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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