use perforation 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.
So, what happens in animals who swallow magnets is that on occasion, two magnets or a magnet and another object can be in different windy bits of the intestinal tract and stick together, pinching two otherwise unconnected parts of the intestine together, sometimes kinking them together sufficiently to cause a blockage, which doctors say could cause perforation of the intestine or other very bad things.
Newson seems to really like perforation: