back-up ring

基本解释

The Tee Seal uses two Nylon Back-Up Rings as anti-extrusion devices, allowing the Tee Seal to function under much higher pressures than a standard O-Ring.
在发球密封采用两个尼龙备份，作为抗挤压设备的戒指，让T恤印高得多的压力下功能比标准O形圈。
When the O-ring has relaxed to grasp the shoulder protection, the bonnet assembly may be assembled into the body with the O-ring clinging to the back-up washer.
当放松O形环使其恢复原状，此时O形环就抓紧肩部保护，带着粘附着后部垫圈的O形环，阀帽组件可以组装进阀体内。
With the improvement of living and the strengthening of consumers self-realization, more and more self-symbol-product, such as CRBT(Color Ring Back Tone), well up in market.
生产力的提高、人们自我意识的加强，促使越来越多类似彩铃的自我符号性商品涌向市场。