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| Basque | English |
| abiadura handiko trenbide | high-speed railway The term "high-speed traffic" encompasses all trains running at speeds over 200 km/h but also trains running at 200 km/h if the terrain, population density or economic reasons do not justify higher speeds |
| lurpeko trenbide | underground railway An electric passenger railway operated in underground tunnels |
| trenbide-sare | railway network The whole system of railway distribution in a country |