the incompatibility of the different national systems poses major problem for international trains because either locomotives have to be changed at each border or they have to be with as many on boards
The incompatibility of the different national systems poses a major problem for international trains because either locomotives have to be changed at each border or they have to be equipped with as many onboard systems as there are systems on the tracks that they will run on.
The incompatibility of the different national systems poses major problem for international trains because either locomotives have to be changed at each border or they have to be with as many onboard systems as there are systems on the tracks that they will run on.