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发明名称
Couverture automatique des passages à niveau des routes nationales traversées par des voies de chemin de fer
摘要
申请公布号
FR835900(A)
申请公布日期
1939.01.05
申请号
FRD835900
申请日期
1938.03.30
申请人
发明人
PAUL SELOUDRE
分类号
B61L29/22
主分类号
B61L29/22
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