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发明名称
DEVICE FOR PROMOTING LEARNING AND EXERCISING FOREIGN LANGUAGES
摘要
申请公布号
HU912590(D0)
申请公布日期
1992.01.28
申请号
HU19910002590
申请日期
1991.08.02
申请人
KONCZ,JENOE,HU
发明人
KONCZ,JENOE,HU
分类号
主分类号
代理机构
代理人
主权项
地址
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