movable point frog

组合辙叉 combined frog;assembled frog 可动心轨辙叉 movable point frog;movable-point frog 可动翼轨辙叉 movable wing rails;movable-wing frog ..

[铁路] movable-point crossing

... mountain tunnel 穿山隧道 movable-point crossing 可动心轨辙叉 multi-current electric locomotive 多电流制电力机车 ...