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发明名称
Improvements in condenser microphones
摘要
申请公布号
GB389888(A)
申请公布日期
1933.03.30
申请号
GB19310028007
申请日期
1931.10.08
申请人
THE BRITISH THOMSON-HOUSTON COMPANY, LIMITED;GEORGE SAIL CAMPBELL LUCAS
发明人
分类号
H04R19/04
主分类号
H04R19/04
代理机构
代理人
主权项
地址
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