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发明名称
Improvements relating to key musical instruments
摘要
申请公布号
GB367908(A)
申请公布日期
1932.02.29
申请号
GB19300035024
申请日期
1930.11.28
申请人
EMANUEL MOOR
发明人
分类号
G10C3/12
主分类号
G10C3/12
代理机构
代理人
主权项
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