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发明名称
Traverse de chemin de fer perfectionnée en béton armé, avec boulons d'attache du rail, et procédé de fabrication de ladite traverse
摘要
申请公布号
FR984615(A)
申请公布日期
1951.07.09
申请号
FRD984615
申请日期
1949.04.01
申请人
SOCIETE NATIONALE DES CHEMINS DE FER FRANCAIS
发明人
SONNEVILLE ROGER
分类号
E01B3/36
主分类号
E01B3/36
代理机构
代理人
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地址
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