Let's talk about engraving printing first. For example, if you want to print a book, you should carve a plate according to the contents of the book and then bake it. This plate can't be changed when it's done. The so-called printing is to brush ink on this plate and print it on white paper.
Therefore, engraving can only be reused in one case, that is, the book is particularly popular, and the number of prints is not enough, so it needs to be printed twice. Moreover, the content of the second printing is exactly the same as that of the first printing, and the content format and all aspects have not changed. Then you can use the original. This situation can be reused.
In other cases, for example, although the same book is printed again, the author may want to change the format or make some adjustments in the content, so it will have to be re-carved.
For another example, if you want to print another book, you must reprint it.
I don't know if this is detailed enough.