| Central Commission for Navigation on the Rhine (CCR) | |
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| European Committee for Standardization (CEN) | |
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European Union | ||
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| International Atomic Energy Agency (IAEA) |
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| International Civil Aviation Organization (ICAO) |
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| International Maritime Organization (IMO) |
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| International Railway Transport Committee (CIT) |
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| International Union of Private Wagons (UIP) | |
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| International Union of Railways (UIC) | |
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| United Nations Economic Commission for Europe (UN/ECE) | |
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