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发明名称
Valve for wind musical instruments
摘要
申请公布号
US1887657(A)
申请公布日期
1932.11.15
申请号
US19320614933
申请日期
1932.06.02
申请人
NELSON WILLIAM W
发明人
NELSON WILLIAM W.
分类号
G10D9/04
主分类号
G10D9/04
代理机构
代理人
主权项
地址
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