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发明名称
Means for preventing slipping of violin strings in tuning
摘要
申请公布号
US1987069(A)
申请公布日期
1935.01.08
申请号
US19330690798
申请日期
1933.09.25
申请人
KROEPLIN HERMAN H
发明人
KROEPLIN HERMAN H.
分类号
G10D3/10
主分类号
G10D3/10
代理机构
代理人
主权项
地址
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