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发明名称
Vorrichtung zur photographischen Aufzeichnung akustischer Schwingungen.
摘要
申请公布号
AT132150(B)
申请公布日期
1933.03.10
申请号
ATD132150
申请日期
1931.07.27
申请人
PAUL FREUND;KARL PULVERMACHER
发明人
PAUL FREUND;KARL PULVERMACHER
分类号
主分类号
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