Two-way pressure has mounted on ball bearings between the shaft and two outer rings, in the middle ringand outer ring were added between the steel ball, able to withstand the two-way axial load.
He excels at all the ball games and represents the red Olympic ring.
他擅长于所有的球类运动，并且代表了红色奥运环。
3
Deep Groove ball bearings are the most popular of all the ball bearing types because they are available in a wide variety of seal, shield and snap-ring arrangements.