"板的挤压" can be translated as "plate extrusion" or "extrusion of plates" in English, depending on the context and the specific meaning you want to convey.
"Plate extrusion" is a more direct and technical translation, often used in engineering or manufacturing contexts to describe the process of forcing a plate-shaped material through a die to form a desired shape.
"Extrusion of plates" is a slightly more descriptive phrase that emphasizes the action being performed on the plates, which might be more suitable in some narrative or explanatory contexts.