氧气 (氧氣) yǎngqì

yǎngqì noun oxygen
Domain: Modern Chinese 现代汉语 , Subdomain: Chemistry , Concept: Chemical Element 元素
Notes: (CC-CEDICT '氧氣'; Guoyu '氧氣'; Mathews 1931 '氧氣'; Wikipedia '氧氣')

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氧气管氧气筒