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发明名称
Verfahren und Vorrichtung zur mechanischen Tonabnahme von in Schallfurchen aufgezeichneten Schwingungen.
摘要
申请公布号
CH198189(A)
申请公布日期
1938.06.15
申请号
CHD198189
申请日期
1937.10.15
申请人
PORCHET ROBERT
发明人
ROBERT PORCHET
分类号
G11B3/10;G11B3/31
主分类号
G11B3/10
代理机构
代理人
主权项
地址
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