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发明名称
Vorrichtung zum Schutze der Membran bei akustischen Geraeten gegen Zerstoerung durchuunmittelbar auftreffende starke Knallgeraeusche
摘要
申请公布号
DE640853(C)
申请公布日期
1937.01.13
申请号
DE1934S113276D
申请日期
1934.03.17
申请人
SIEMENS APPARATE;MASCHINEN G.M.B.H.
发明人
GOSEWINKEL DIPL.-ING. MARTIN
分类号
H04R7/26
主分类号
H04R7/26
代理机构
代理人
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