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发明名称
HOERGERAET, INSBESONDERE FUER SCHWERHOERIGE, MIT EINEM DIE MIKROFONOEFFNUNG MIT DER SCHALLEINTRITTSOEFFNUNG IM GERAETGEHAEUSE VERBINDENDEN ELASTISCHEN SCHLAUCH.
摘要
申请公布号
DE1970572(U)
申请公布日期
1967.10.19
申请号
DE196700H9213U
申请日期
1967.06.03
申请人
HANSATON RUDOLF G. E. FISCHER K.G.
发明人
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