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发明名称
ACOUSTIC REPRODUCERS
摘要
申请公布号
GB1518285(A)
申请公布日期
1978.07.19
申请号
GB19740050005
申请日期
1975.11.18
申请人
AKROYD J
发明人
分类号
H04R7/04;H04R7/12;H04R7/16;(IPC1-7):H04R7/10
主分类号
H04R7/04
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代理人
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