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发明名称
Improvements in or relating to electrical signalling systems
摘要
申请公布号
GB449188(A)
申请公布日期
1936.06.22
申请号
GB19340036758
申请日期
1934.12.21
申请人
AUTOMATIC ELECTRIC COMPANY LIMITED;PHILIP NORTON ROSEBY
发明人
分类号
H02J13/00
主分类号
H02J13/00
代理机构
代理人
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地址
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