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发明名称
Improvements relating to light signals
摘要
申请公布号
GB644052(A)
申请公布日期
1950.10.04
申请号
GB19470020659
申请日期
1947.07.30
申请人
WESTINGHOUSE BRAKE & SIGNAL COMPANY LIMITED
发明人
分类号
F21V9/08
主分类号
F21V9/08
代理机构
代理人
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