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发明名称
Mikrotelephon zur Verwendung in geraeuschvoller Umgebung
摘要
申请公布号
DE559258(C)
申请公布日期
1932.10.05
申请号
DENDATL077144D
申请日期
申请人
C. LORENZ AKT.-GES.
发明人
分类号
H04M1/03
主分类号
H04M1/03
代理机构
代理人
主权项
地址
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