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发明名称
Membrane pour haut-parleurs dynamiques
摘要
申请公布号
FR725874(A)
申请公布日期
1932.05.19
申请号
FRD725874
申请日期
1931.11.07
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
分类号
H04R9/04;H04R9/12
主分类号
H04R9/04
代理机构
代理人
主权项
地址
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