| Mixer, breathing gases, anesthesia inhalation / Gas-machine, anesthesia | 10 | — |
| Regulator, pressure, gas cylinder / Transducer, gas pressure | 9 | — |
| Tube, thorpe, uncompensated / Flowmeter, nonback-pressure compensated, bourdon gauge | 8 | — |
| Vaporizer, anesthesia, non-heated / Apparatus, gas-scavenging | 13 | — |