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发明名称
Sound recording device
摘要
申请公布号
GB389448(A)
申请公布日期
1933.03.16
申请号
GB19310016833
申请日期
1931.06.09
申请人
LEONARD HALLY ROOS
发明人
分类号
B60S5/04;G03B31/00
主分类号
B60S5/04
代理机构
代理人
主权项
地址
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