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发明名称
SPEAKER GRILLES
摘要
申请公布号
GB1473047(A)
申请公布日期
1977.05.11
申请号
GB19750025059
申请日期
1975.06.11
申请人
NORTHERN ELECTRC COR
发明人
分类号
B29C65/08;H04M1/62;H04R1/02;(IPC1-7):H04M1/02
主分类号
B29C65/08
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代理人
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