For needle roller bearings without inner ring, a suitable internal clearance is achieved by selecting the appropriate tolerance for the raceway diameter.
对于无内圈滚针轴承，通过为滚道直径选择合适的公差，可得到合适的内部游隙。
Radial spherical plain bearings have an inner ring with a sphered convex outside diameter and an outer ring with a correspondingly sphered but concave inside surface.
径向球面滑动轴承由一个具有凸球形外表面的内圈和一个具有相应凹球形内表面的外圈组成。
Ring lights can be designed by Angle, outer diameter, inner diameter, color, intensity, equality and instillation position.
可按照角度，外径，内径，颜色，亮度，均匀性，安装孔位定制。
Ring lights can be designed by Angle, outer diameter, inner diameter, color, intensity, equality and instillation position.
可按照角度，外径，内径，颜色，亮度，均匀性，安装孔位定制。
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