noun
oxygen-deficient air
Technical term for air with low oxygen content, often used in safety contexts.
酸欠空気が発生しやすい場所では、換気を十分に行ってください。
In places where oxygen-deficient air is likely to occur, please ventilate thoroughly.
酸欠 is a broader term for oxygen deficiency or lack of oxygen, while 酸欠空気 specifically refers to the air itself that is deficient in oxygen.
Compound of 酸欠 (oxygen deficiency) and 空気 (air).