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经营范围
发明名称
RAIL TRACK CROSSING FROG
摘要
申请公布号
SU652254(A1)
申请公布日期
1979.03.15
申请号
SU19772474347
申请日期
1977.04.15
申请人
PROEKTNO-TEKHNOLOGICHESKO-KONSTRUKTORSKOE BYURO GL U PUTI
发明人
ELSAKOV NIKOLAJ N,SU;PETROV YURIJ N,SU;DEMIDOV VITALIJ P,SU;ILICH ALEKSEJ M,SU
分类号
E01B7/14;(IPC1-7):E01B7/14
主分类号
E01B7/14
代理机构
代理人
主权项
地址
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