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发明名称
TOLL SWITCHING TELEPHONE SYSTEMS
摘要
申请公布号
CA565967(A)
申请公布日期
1958.11.11
申请号
CAD565967
申请日期
申请人
GENERAL TELEPHONE LABORATORIES
发明人
HARVEY W. BALZER
分类号
主分类号
代理机构
代理人
主权项
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