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发明名称
Improvements in or relating to alarm arrangements suitable for use in telecommunication systems
摘要
申请公布号
GB795347(A)
申请公布日期
1958.05.21
申请号
GB19540036047
申请日期
1954.12.13
申请人
BRITISH TELECOMMUNICATIONS RESEARCH LIMITED
发明人
BOURA JOHN
分类号
H04J1/16
主分类号
H04J1/16
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