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发明名称
Musical instrument practising aid
摘要
申请公布号
GB9914614(D0)
申请公布日期
1999.08.25
申请号
GB19990014614
申请日期
1999.06.23
申请人
WHITEHOUSE, DAVID J
发明人
分类号
G09B15/00;G09B15/06;G10D9/00
主分类号
G09B15/00
代理机构
代理人
主权项
地址
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