It simple terms it's a giant tube that creates negative pressure (vacuum) and holds it there then a solenoid opens a valve to allow which gas they want inside and they use this for testing surgical equipment.
We build pretty much the same thing for the manufacturing of surgical utensils. They use the negative pressure and different gas to sterling and meet QC specs.
If you look up
key high vacuum. That company is a direct copy of mine and we build the same stuff and are always fighting for bids, but since we have been so busy and they have a new owner we are kind of merging. Sending work to us that they can't handle (water jet, edm, 5 axis cncs) since they don't have that equipment and we send overflow piece work to them.