Last Updated
：2025/11/29
Armstrong line
Proper noun
Japanese Meaning
アームストロング線とは、海抜高度において水が加圧環境なしで沸騰し、人体がその高度で生存するためには圧力スーツや加圧環境が必要となり、体液が沸騰するのを防ぐための境界高度を指す。
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The altitude above sea level at which water boils without a pressurized environment, and at which a person would require a pressure suit or pressurized environment to survive, and avoid having their bodily fluids boil away.
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Armstrong line
At around 19 kilometers above sea level, the Armstrong line marks the boundary where water boils in an unpressurized environment and an unprotected person would need a pressure suit to avoid their bodily fluids boiling away.
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At around 19 kilometers above sea level, the Armstrong line marks the boundary where water boils in an unpressurized environment and an unprotected person would need a pressure suit to avoid their bodily fluids boiling away.
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