https://kidshealth.org/en/parents/vacuum-bell-device.html
Pectus Excavatum: Vacuum Bell Device | Nemours KidsHealth
Health care providers sometimes suggest that kids use a vacuum bell to help correct pectus excavatum, a condition that causes a caved-in chest.
pectus excavatumvacuum belldevicenemourskidshealth
https://www.idrive.com/ssmtheory/quantum-error-correcting-origin-of-spacetime
The Quantum Error-Correcting Origin of Spacetime: From Bell Pair to FCC Vacuum
Explore the reverse-engineering of the [[192, 130, 3]] CSS quantum error-correcting code to its minimal initial condition.