轴承实物。深沟球轴承，推力球轴承，调心球轴承，角接触球轴承，四点接触球轴承，圆柱滚子轴承，双列圆柱滚子轴承，滚针轴承，调心滚子轴承，关节轴承。

Bearing sample. Deep groove ball bearings, Thrust ball bearings, Self-Aligning ball bearings, Cylindrical roller bearings, Needle bearings, etc.