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发明名称
Private automatic branch exchanges
摘要
申请公布号
GB660274(A)
申请公布日期
1951.11.07
申请号
GB19480021724
申请日期
1948.08.17
申请人
AUTOMATIC ELECTRIC LABORATORIES, INC.
发明人
分类号
H04Q3/62
主分类号
H04Q3/62
代理机构
代理人
主权项
地址
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