-calledOREwheeldevelopedbytheEuropeanrailwaysundertheroofoftheORE(todayEuropeanRailResearchInstituteERRI)astheresearchinstituteoftheUIC(InternationalUnionofRailways).Followingtheextendeduseofsolidwheelsinconnectionwithablockbrake,-radialfracturefromthewheelrimstraightthroughthewebdowntothehuborbeginningintherim,-ellipticalorfourth-ellipticalfatiguecracks,whichstartedonthetread,(ERRI),whichispartoftheUIC,wasse
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