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发明名称
APARAT PENTRU DEMONSTRATII MATEMATICE
摘要
申请公布号
RO97484(A2)
申请公布日期
1989.05.30
申请号
RO19870130154
申请日期
1987.10.21
申请人
CATANOIU DAVID,RO
发明人
CATANOIU DAVID,RO
分类号
G09B23/02;(IPC1-7):G09B23/02
主分类号
G09B23/02
代理机构
代理人
主权项
地址
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