Checknut
防松螺母, 保险螺帽, 锁紧螺母
🗣️ 情景例句
It's a big one!
真大哟！
Tell us about your post-purchase servicing.
告诉我们有关你们售后服务的情况。
You'd better not go inside. There might be snakes.
你最好不要进去。说不定有蛇呢。