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发明名称
Improved signalling means for use on public passenger vehicles
摘要
申请公布号
GB639212(A)
申请公布日期
1950.06.21
申请号
GB19470013831
申请日期
1947.05.22
申请人
GEORGE ROCK
发明人
分类号
H01B7/10
主分类号
H01B7/10
代理机构
代理人
主权项
地址
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