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Kosmos 638

Kosmos 638 was an uncrewed test of the 1975 Apollo–Soyuz Test Project Soyuz. It carried an APAS-75 androgynous docking system.

Mission parameters
• Spacecraft: Soyuz-7K-TM №71 • Mass: 6510 to 6680 kg • Crew: None • Launched: April 3, 1974 • Landed: April 13, 1974 ==See also==
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