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发明名称
TASCHENHOERGERAET FUER SCHWERHOERIGE.
摘要
申请公布号
DE1847045(U)
申请公布日期
1962.02.22
申请号
DE196100D3663U
申请日期
1961.11.24
申请人
DEUTSCHE AKUSTIK-GESELLSCHAFT STEUP & CO. G.M.B.H.
发明人
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