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S-4
Part of S-2 Pressure Suit Family
American pressure suit, operational 1955. The S-4 was a modified S-2 partial pressure suit, no anti-G, chest bladder incorporated for ease of breathing.

Status: operational 1955.

Also incorporated abdominal bladder for individuals who experienced abdominal difficulties, e.g. weak inguinal rings.



Family: Space Suits. Country: USA. Agency: David Clark. Bibliography: 487.

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