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发明名称
Improvements in automatic switching apparatus for tele-signalling systems
摘要
申请公布号
GB495462(A)
申请公布日期
1938.11.11
申请号
GB19370003510
申请日期
1937.02.05
申请人
TELEFONAKTIEBOLAGET L.M. ERICSSON
发明人
分类号
H01H67/12
主分类号
H01H67/12
代理机构
代理人
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地址
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