Last Updated
：2025/12/05
primary life support system
（ plural ）
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A backpack, worn on a space suit, that provides breathable oxygen and removes expelled carbon dioxide
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primary life support system
Before stepping onto the lunar surface, the astronauts checked their primary life support system to ensure it would provide breathable air and scrub carbon dioxide.
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Before stepping onto the lunar surface, the astronauts checked their primary life support system to ensure it would provide breathable air and scrub carbon dioxide.
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