back-up ring

I'll ask Simon to ring you back when he gets in.

等西蒙来了，我让他给你回电话。

Join in correct position with back-up ring no.5.

将支撑环连接到正确的位置上。

Disassemble back-up ring and mount only in the case of replacement.

仅在更换时分解支撑环和底座。

Finite Element Analysis of Stress and Contact Pressure of Rubber O-sealing Ring with Back-up Ring

O形橡胶密封圈配合挡圈密封的应力与接触压力有限元分析

He isn't here now ─ could you ring back later?

他现在不在——你过会儿再打电话来好吗？

Tell her I'll ring back in a few minutes...

告诉她，我过几分钟就会给她回电话。

If there's any problem I'll ring you back.

如果有什么问题的话，我再给你打电话。

She leaps in one bound onto her pony's back for a speedy canter around the ring

她纵身一跃骑上了马背，绕着场地策马慢跑。