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发明名称
Diaphragm for electrodynamic loud speakers
摘要
申请公布号
US1971452(A)
申请公布日期
1934.08.28
申请号
US19320598155
申请日期
1932.03.11
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
HERRMANN ALICE
分类号
H04R9/04
主分类号
H04R9/04
代理机构
代理人
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