A repainted nitrous oxide cylinder?
Milne
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D018685:Anesthetics, Inhalation; D003116:Color; D004349:Drug Packaging; D006801:Humans; D009609:Nitrous Oxide; D010100:Oxygen; D010150:Paint
D018685:Anesthetics, Inhalation; D009609:Nitrous Oxide; D010100:Oxygen