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发明名称
Translucent sound record
摘要
申请公布号
US1956626(A)
申请公布日期
1934.05.01
申请号
US19310522683
申请日期
1931.03.14
申请人
发明人
ROBBINS PERCY A.
分类号
G11B7/08;G11B7/24
主分类号
G11B7/08
代理机构
代理人
主权项
地址
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