switch with a movable frog 活动辙叉道岔

movable-wing frog 可动翼轨辙叉

movable point frog 可动心轨辙叉 ; 可动辙岔

frog movable point 可动辙岔

movable derailing frog 移动脱轨辙叉

Frog with a movable nose 尖端可动叉心

movable-point frog 可动心轨辙叉

movable wing rails movable-wing frog 可动翼轨辙叉

movable-nose frog 可动心轨辙叉