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发明名称
Improvements in or relating to telecommunication systems
摘要
申请公布号
GB744122(A)
申请公布日期
1956.02.01
申请号
GB19500013535
申请日期
1950.05.31
申请人
AUTOMATIC TELEPHONE & ELECTRIC COMPANY LIMITED
发明人
MERCER RICHARD
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
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