The invention relates to a bearing, especially rollerjoint bearing, comprising outer and inner ring.
本实用新型涉及一种轴承，尤其是涉及一种关节轴承。
2
Roller Skating is not the role of powerful forces in the body, muscle and joint injuries is relatively small.
轮滑运动没有强大的力量作用在身上，对肌肉和关节的伤害比较小。
3
Crushing roller is a straw chopping stubble-breaking machine critical core component of a joint operation, with simple structure, the advantages of good straw chopping effects.