铺碴机 [公路] ballaster ; ballasting machine ; machine for ballasting

电磁铺碴机 magnetic ballasting machine

铺碴车 ballasting car ; ballast spreader ; [公路] spreader car

铺碴轨道结枸 ballasted track structure

道碴撒铺车 ballast spreader

铺完石碴 ballasting up

铺道碴 ballasting

底碴摊铺 road metal base paving