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发明名称
摘要
申请公布号
FR2003837(A1)
申请公布日期
1969.11.14
申请号
FR19690007184
申请日期
1969.03.13
申请人
WESTINGHOUSE ELECTRIC
发明人
分类号
H04R1/44;B06B1/06;(IPC1-7):H04R9/00
主分类号
H04R1/44
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