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Ningbo Wtoo Machinery Technology Co., Ltd., Is A Professional China Angular Contact Ball Bearings Manufacturers And Custom Angular Contact Ball Bearings Factory . Founded In May 2000, Is A Wholly-owned Enterprise, Covering An Area Of 31682 Square Meters, With A Plant Area Of 61000 Square Meters, And Has 950 Employees, Including 110 Research And Development Personnel. The Production And Sales Volume Of Miniature Deep Groove Ball Bearings With Inner Diameter Ranging From 3mm To 60mm Ranks The First In China And The Second In The World.