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发明名称
Improvements relating to electric signalling systems
摘要
申请公布号
GB551092(A)
申请公布日期
1943.02.08
申请号
GB19410013206
申请日期
1941.10.14
申请人
SIEMENS BROTHERS & CO. LIMITED;ERIC WESTALL DURKIN
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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