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发明名称
KEYING INDICATOR
摘要
申请公布号
JPS5837691(A)
申请公布日期
1983.03.04
申请号
JP19810136275
申请日期
1981.08.31
申请人
NIPPON GAKKI SEIZO KK
发明人
OOBA SAKIO
分类号
G09B15/00;G10G1/00
主分类号
G09B15/00
代理机构
代理人
主权项
地址
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