1. Due to good cubricity on the surface, the friction factor on the working surface is lowered, weightness is less influnced compared with ordinary rings the running-in time is shortened and the frame can be started with high speed.

2. Greatly reduce the adhesive and fatigue wear, prolong the once-through service life consequently.

3. In spinning and twisting, the elasticity of ballouing is good and the shape of it is normal, the spill less weight, and scorching or sliding of traveller is obviously reduced.

4. Obviously reduce fibrous yarn, raising yarn grade.

5. Strong rot resistance in hyperthermia and wet enviorenment.

6. The main advantage of the ring is displayed in once-through service time usually, it doesn't need grinding if grinded, it's property is the same as ordinary ones.