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发明名称
Volume control for radio-phonographs and like sound reproducing apparatus
摘要
申请公布号
GB559673(A)
申请公布日期
1944.02.29
申请号
GB19420017889
申请日期
1942.12.16
申请人
PHILCO RADIO AND TELEVISION CORPORATION
发明人
分类号
主分类号
代理机构
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