A kind of washboard - likecrack on steel plate surface is introduced.
文章介绍钢板表面产生的一种搓板状裂纹。
2
You'll crack up if you carry on working like this.
你再这样干下去，身体会垮掉的。
《牛津词典》
3
Most of them are home to major universities, and even people who live in Disney's back yard still like to crack open a book and imagine their own Magic Kingdom from time to time.