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发明名称
Piano action
摘要
申请公布号
US2691319(A)
申请公布日期
1954.10.12
申请号
US19520325784
申请日期
1952.12.13
申请人
WATERS WILBUR W
发明人
WATERS WILBUR W.
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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