DIFF Subgroup
E01F 13/105 Full Title
Arrangements for obstructing or restricting traffic, e.g. gates, barricades (for railway crossings B61L ) > Vehicle barriers specially adapted for allowing passage in one direction only
E01F 13/105 Arrangements for obstructing or restricting traffic, e.g. gates, barricades (for railway crossings B61L ) > Vehicle barriers specially adapted for allowing passage in one direction only