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发明名称
Explosions- und schlagwettersicheres dynamisches Lautsprechersystem
摘要
申请公布号
DE955246(C)
申请公布日期
1957.01.03
申请号
DE1953N006979
申请日期
1953.04.02
申请人
GOTTFRIED NEUMANN, ELEKTROAKUSTIK-HOCHFREQUENZTECHNIK
发明人
NEUMANN GOTTFRIED
分类号
H04R9/06
主分类号
H04R9/06
代理机构
代理人
主权项
地址
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