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经营范围
发明名称
Acoustic diaphragm
摘要
申请公布号
GB369476(A)
申请公布日期
1932.03.24
申请号
GB19310016165
申请日期
1931.06.04
申请人
VERNON TAYLOR HOUGHTON
发明人
分类号
H04R7/20
主分类号
H04R7/20
代理机构
代理人
主权项
地址
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