High Quality Content by WIKIPEDIA articles! The UIC type X, Y and Z coaches are passenger coaches for international railway services that have been standardised in certain respects by the International Union of Railways (Union internationale des chemins de fer, kurz UIC). In 1961 types X and Y were defined in UIC Leaflet 567, the type Z followed subsequently. This standardisation was intended to give rail passengers on international services a standard level of comfort; in addition it was intended to simplify the maintenance of coaches when abroad. One of the standards introduced was the use of rubber corridor connectors on gangways instead of bellows.

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