Besides this paper discusses the sorting principle of micro diameter glass bead and brings forward sorting roundness with motion resistance and knocked-on reflection principle.

此外，还讨论了作为准流体的微径玻璃珠分选原理，提出可通过运动阻力和平面撞击反射原理相结合筛分得到圆形微径玻璃珠。

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Dacron polyester fibers have a high resistance to burning. They tend to fuse and shrink away from the flame, forming a bead that is very hard after cooling.

大可纶纤维具有较好的阻燃性能。在点燃聚酯纤维时，纤维会熔化并在火焰作用下收缩，最终形成球状。冷却后熔球具有较高的硬度。

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