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发明名称
Improvements in signalling arrangements for railways
摘要
申请公布号
GB634082(A)
申请公布日期
1950.03.15
申请号
GB19460011042
申请日期
1946.04.10
申请人
SOCIETE AUXILIAIRE D'ETUDES ELECTROTECHNIQUES
发明人
分类号
B61L3/18
主分类号
B61L3/18
代理机构
代理人
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