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发明名称
Improvements relating to light signals
摘要
申请公布号
GB393281(A)
申请公布日期
1933.05.30
申请号
GB19310033133
申请日期
1931.11.30
申请人
THE WESTINGHOUSE BRAKE AND SAXBY SIGNAL COMPANY LIMITED
发明人
分类号
B61L5/18
主分类号
B61L5/18
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代理人
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