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发明名称
Tonwahlsystem
摘要
申请公布号
AT238781(B)
申请公布日期
1965.02.25
申请号
AT19610007372
申请日期
1961.09.30
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
分类号
H04M1/50;H04Q3/42
主分类号
H04M1/50
代理机构
代理人
主权项
地址
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