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发明名称
NIEDERFREQUENZ-WIEDERGABEGERAET MIT EINEM SCHALLSPEICHER.
摘要
申请公布号
DE1719156(U)
申请公布日期
1956.03.22
申请号
DE195500P8574U
申请日期
1955.07.29
申请人
PHILIPS PATENTVERWALTUNG G.M.B.H.
发明人
分类号
主分类号
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