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发明名称
VORRICHTUNG ZUM FESTSTELLEN DER KOSTEN FUER SELBSTWAEHL-FERNGESPRAECHE.
摘要
申请公布号
DE1972311(U)
申请公布日期
1967.11.09
申请号
DE196700B0894U
申请日期
1967.05.09
申请人
ERNST BERGMANN
发明人
ERNST BERGMANN
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主分类号
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