... our factories. Built: 1985The staff: approximately 1300Quality: ABEC1,ABEC3,ABEC5, Noise level:Z2,Z3,Z4 According to ISO9001Products: Deep groove ball bearings ... , roller bearings.Materials: chrome steel (Gcr15)Technology: low vibration, low noise, high precision and durable.Usage: household appliance, medical facilities, communication ...