lock nut

lock nut

锁紧螺帽
锁定螺母
制动螺母
止动螺母
防松螺母
保险螺母

例句与用法：

The two of them are locked in a titanic struggle for control of the company.

他们俩为争夺对公司的控制权打得不可开交。

At 9 pm the prisoners are locked in for the night.

晚9时把犯人锁进牢房过夜。