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经营范围
发明名称
RAILWAY CROSSING SIGNAL
摘要
申请公布号
CA371535(A)
申请公布日期
1938.01.25
申请号
CAD371535
申请日期
申请人
CLYDE EVANS
发明人
CLYDE EVANS
分类号
主分类号
代理机构
代理人
主权项
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