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发明名称
Perfectionnements aux dispositifs de tension des cordes et plus spécialement des cordes d'un piano
摘要
申请公布号
FR692419(A)
申请公布日期
1930.11.05
申请号
FRD692419
申请日期
1929.06.14
申请人
发明人
CARBEN LEON
分类号
G10C3/04
主分类号
G10C3/04
代理机构
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