短語詞組短語slab -track 板式軌道slab ballastless track 板式無碴軌道common slab ballastless track 普通板式軌道Burger slab ballastless track 博格板式無碴軌道slab ballastless track on bridge 橋上板式無砟軌道slab track slab -track 板式軌道continuous -slab-track 縱連板式軌道Floating Slab Track Bed 浮置板道牀vibration damping slab track 減振板式無砟軌道 返回 slab track