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经营范围
发明名称
Improvements in or relating to pianos
摘要
申请公布号
GB746013(A)
申请公布日期
1956.03.07
申请号
GB19540018779
申请日期
1954.06.25
申请人
THOMAS HUTCHESON DOIG
发明人
分类号
G10C3/28
主分类号
G10C3/28
代理机构
代理人
主权项
地址
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