annule
n. 菌环，环带
例句
It can decrease abrasion between the chain and the felt annules' bottom greatly, strengthen pulling force of felt annules and extend the service life of the felt annule.
大大降低了链条与环带底面之间的磨损，增强了毛毡环带的拉力，延长了毛毡环带的使用寿命。
