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发明名称
Perfectionnement aux claviers à touches, d'instruments de musique
摘要
申请公布号
FR1128767(A)
申请公布日期
1957.01.10
申请号
FRD1128767
申请日期
1955.07.13
申请人
发明人
RUBY FREDERIC-LEON
分类号
G09B15/00
主分类号
G09B15/00
代理机构
代理人
主权项
地址
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