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发明名称
Elektrostatisch wirkendes, elektroakustisches Gerät.
摘要
申请公布号
CH153242(A)
申请公布日期
1932.03.15
申请号
CHD153242
申请日期
1931.02.11
申请人
VOGT,HANS
发明人
VOGT,HANS
分类号
主分类号
代理机构
代理人
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