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 ..
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... 可动辙岔 movable point frog 可动轨条 movable rail 移动变动所 movable substation ...
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