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发明名称
Pneumatischer Lautsprecher
摘要
申请公布号
DE822250(C)
申请公布日期
1951.11.22
申请号
DE1948P020861
申请日期
1948.11.05
申请人
DIPL.-ING. ANTON M. SPRINGER
发明人
SPRINGER DIPL.-ING. ANTON M.
分类号
H04R1/42
主分类号
H04R1/42
代理机构
代理人
主权项
地址
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