use perforations in a sentence.
Those perforations are lasered out, like they do the MBP speaker grill/holes.
I suppose people that buy these will just put them on a shelf, but if not, those perforations are going to fill with garbage.
Metal screens are just stamped or rolled sheet metal, while these perforations are made by a CNC mill from the same piece of aluminium as the rest of the body.
Might not mean anything to a layperson but watching a CNC mill make thousands of precision perforations would be quite a sight.