Dynamicmodelofadeep-grooveballbearingincludinglocalizedanddistributeddefects.Part1:theory；DynamicsofmagneticfluidsupportgrindingofSi{sub}3N{sub}4ceramicballsforultraprecisionbearingsanditsimportanceinsphericalsurfacegeneration；EarlyDetectionofAbnormalitiesinBallBearingsUsinganUltrasonicTechnique；EffectofLubricatingOilsonCageFailureofBallBearings
