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发明名称
CIRCUITO PER L APPRENDIMENTO DELLA TAVOLA PITAGORICA
摘要
申请公布号
IT1023292(B)
申请公布日期
1978.05.10
申请号
IT19740054089
申请日期
1974.11.18
申请人
MAZZANTI ROMUALDO
发明人
分类号
G09B;(IPC1-7):G09B/
主分类号
G09B
代理机构
代理人
主权项
地址
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