NK40/20R+1R35X40X20 日本NTN轴承座 NJ320G1C4,NK40/20R+1R35X40X20重量,NK40/20R+1R35X40X20尺寸,NK40/20R+1R35X40X20参数 4T-05079/05185重量,4T-05079/05185尺寸,4T-05079/05185参数,