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发明名称
TIE LINES FOR AUTOMATIC TELEPHONE EXCHANGE
摘要
申请公布号
CA460749(A)
申请公布日期
1949.11.01
申请号
CAD460749
申请日期
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
GERALD DEAKIN
分类号
主分类号
代理机构
代理人
主权项
地址
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