abstract:A rack railway (also rack-and-pinion railway, cog railway) is a steep grade railway with a toothed rack rail, usually between the running rails. The trains are fitted with one or more cog wheels or pinions that mesh with this rack rail.
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a steep mountain railway having a middle rail fitted with a rack that engages a pinion on the locomotive to provide traction 齿轨铁路 (Also called cog railway)