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发明名称
Elektrode für Mikrophone.
摘要
申请公布号
CH214507(A)
申请公布日期
1941.04.30
申请号
CHD214507
申请日期
1939.04.05
申请人
BELL TELEPHONE MANUFACTURING COMPANY, SOCIETE ANONYME
发明人
BELL TELEPHONE MANUFACTURING COMPANY, SOCIETE ANONYME
分类号
H04R21/02
主分类号
H04R21/02
代理机构
代理人
主权项
地址
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