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经营范围
发明名称
ROAD CROSSING
摘要
申请公布号
SU804748(A1)
申请公布日期
1981.02.15
申请号
SU19792752134
申请日期
1979.04.13
申请人
SARATOVSKIJ G DOROZHNOGO PROEKTNO-IZYSKATELSKOGO NI INSTITUTA
发明人
SEVOSTYANOV VALENTIN M,SU;ALEKSEEV VYACHESLAV V,SU
分类号
E01C1/00;(IPC1-7):E01C1/00
主分类号
E01C1/00
代理机构
代理人
主权项
地址
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