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发明名称
Improvements in or relating to signalling circuit arrangements
摘要
申请公布号
GB973309(A)
申请公布日期
1964.10.21
申请号
GB19620025756
申请日期
1962.07.05
申请人
CARL-LUDWIG LEHNER
发明人
分类号
G08C19/12;H04B5/00
主分类号
G08C19/12
代理机构
代理人
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