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qualora altre misure non possano escludere pericoli di scarrucolamento, il veicolo deve essere munito di un dispositivo antiscarrucolamento che ne consenta l'arresto senza rischi per le persone.
where all risk of derailment of the vehicle cannot be eliminated by other measures, the vehicle shall be fitted with an anti-derailment device which enables the vehicle to be brought to a halt without risk to persons.