Checknut
防松螺母, 保险螺帽, 锁紧螺母
🗣️ 情景例句
It's inevitable that he'll find out about it.
他无可避免地会发觉此事。
Oh,don't worry about it.
哦，别担心。
he stooped to talk to a workman.After they had gone on,
途中，停下来与一个工人交谈，接着他们继续往前走去。