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发明名称
Improvements in or relating to sound reproducing systems
摘要
申请公布号
GB448973(A)
申请公布日期
1936.06.18
申请号
GB19350024038
申请日期
1935.08.28
申请人
ELECTRICAL RESEARCH PRODUCTS INC.
发明人
分类号
H04R9/12;H04R9/16
主分类号
H04R9/12
代理机构
代理人
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