230/900CAK/W33+OH30/900H轴承 NJ2213R轴承 NKX30轴承 7318B/DB轴承 6911LLB轴承 239/950CAK/W33+OH39/950H轴承 NJ2214R轴承 NKX30-Z轴承 7315B/DB轴承 6911LLU轴承 230/950CAK/W33+OH30/950H轴承 NJ2214轴承 NKXR30轴承 7314B/DB轴承 6911N轴承 230/1000CAK/W33+OH30/1000H轴承