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经营范围
发明名称
Railroad level-crossing protective system
摘要
申请公布号
GB923089(A)
申请公布日期
1963.04.10
申请号
GB19610011741
申请日期
1961.03.30
申请人
SOUTHERN PACIFIC COMPANY
发明人
分类号
B61L29/28
主分类号
B61L29/28
代理机构
代理人
主权项
地址
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