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发明名称
CALCOLATRICE A SCOPO DIDATTICO
摘要
申请公布号
IT1109156(B)
申请公布日期
1985.12.16
申请号
IT19780019193
申请日期
1978.01.12
申请人
HELMUT LEISMANN
发明人
分类号
G06C1/00;G06G1/14;G09B19/02;(IPC1-7):G09B/
主分类号
G06C1/00
代理机构
代理人
主权项
地址
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