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发明名称
AN ABACUS WITH COUNTERS
摘要
申请公布号
KR890009061(Y1)
申请公布日期
1989.12.15
申请号
KR19870000345U
申请日期
1987.01.14
申请人
CHO, JANG-WON
发明人
CHO, JANG-WON
分类号
G06C1/00;(IPC1-7):G06C1/00
主分类号
G06C1/00
代理机构
代理人
主权项
地址
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