DIFF Subgroup
E01F 13/048 Full Title
Arrangements for obstructing or restricting traffic, e.g. gates, barricades (for railway crossings B61L ) > movable to allow or prevent passage
E01F 13/048 Arrangements for obstructing or restricting traffic, e.g. gates, barricades (for railway crossings B61L ) > movable to allow or prevent passage