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发明名称
Boarding and exit bus indicators
摘要
申请公布号
GB0108683(D0)
申请公布日期
2001.05.30
申请号
GB20010008683
申请日期
2001.04.06
申请人
CRAWFORD, CECIL L
发明人
分类号
G09F21/04
主分类号
G09F21/04
代理机构
代理人
主权项
地址
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