The Minnitt Gas/Air Apparatus (Queen Charlotte model).
Westhorpe
R
R
D016362:Analgesia, Obstetrical / Q000266:history* / Q000295:instrumentation; D016058:Analgesia, Patient-Controlled / Q000266:history* / Q000295:instrumentation; D004739:England; D049673:History, 20th Century; D006801:Humans