DIFF Subgroup
E01F 13/042 Full Title
Arrangements for obstructing or restricting traffic, e.g. gates, barricades (for railway crossings B61L ) > movable to allow or prevent passage
E01F 13/042 Arrangements for obstructing or restricting traffic, e.g. gates, barricades (for railway crossings B61L ) > movable to allow or prevent passage