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发明名称
TRAINING KEYBOARD
摘要
申请公布号
JPS6311984(A)
申请公布日期
1988.01.19
申请号
JP19860156790
申请日期
1986.07.02
申请人
YAMAHA CORP
发明人
SUGIMOTO KEIJI
分类号
G09B15/00;G10C3/12
主分类号
G09B15/00
代理机构
代理人
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地址
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