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发明名称
Improvements in or relating to circuit arrangements for setting group selectors in tele-communication and especially telephone installations
摘要
申请公布号
GB795128(A)
申请公布日期
1958.05.14
申请号
GB19550005489
申请日期
1955.02.23
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
分类号
H04Q3/00
主分类号
H04Q3/00
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代理人
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