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发明名称
Railroad grade crossing protection system
摘要
申请公布号
US3246143(A)
申请公布日期
1966.04.12
申请号
US19630314578
申请日期
1963.09.30
申请人
SOUTHERN PACIFIC COMPANY
发明人
STEELE CARROLL M.;KROUT ARLO C.
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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