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发明名称
Schall-Resonator für Lautwiedergabe.
摘要
申请公布号
AT128227(B)
申请公布日期
1932.05.10
申请号
ATD128227
申请日期
1931.03.24
申请人
ING. OTTO LOEWIT
发明人
ING. OTTO LOEWIT
分类号
主分类号
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代理人
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