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发明名称
Piano action
摘要
申请公布号
US2874601(A)
申请公布日期
1959.02.24
申请号
US19540449829
申请日期
1954.08.16
申请人
DOWLING CHARLES R
发明人
DOWLING CHARLES R.
分类号
G10C3/16
主分类号
G10C3/16
代理机构
代理人
主权项
地址
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