CAV: cavity, finger cavity, master mold, master mold.

As for the front mold and the back mold, there are few such statements.

In my judgment, COR is the "preceding paragraph" and CAV is the "latter paragraph".

(Because the naming of die parts is actually based on the gender of people (such as male and female dies), think about it, the core-punch-front die is still a little logical. )