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发明名称
Piano construction
摘要
申请公布号
US2600910(A)
申请公布日期
1952.06.17
申请号
US19500161580
申请日期
1950.05.12
申请人
NICKEL HAL G
发明人
NICKEL HAL G.
分类号
G10C3/02
主分类号
G10C3/02
代理机构
代理人
主权项
地址
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