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发明名称
AUTOMATIC TELEPHONE SYSTEM
摘要
申请公布号
CA617567(A)
申请公布日期
1961.04.04
申请号
CAD617567
申请日期
申请人
NORTH ELECTRIC COMPANY
发明人
PER O. DAHLMAN;DORSEY D. SIMMONS
分类号
主分类号
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