"Gas off" or "vaporizer off".
Scott
J R
JR
Ruttman
T G
TG
D000395:Air Pollutants, Occupational; D016902:Air Pollution, Indoor / Q000517:prevention & control*; D000764:Anesthesia, Closed-Circuit / Q000379:methods; D018685:Anesthetics, Inhalation; D006801:Humans; D009330:Nebulizers and Vaporizers
D000395:Air Pollutants, Occupational; D018685:Anesthetics, Inhalation