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That portion of the flight of a ballistic missile or space vehicle during which the booster and sustainer engines operate, raketi või muu kosmoliikuri lennu algfaas, mille jooksul saavutab rakett mootori tõukejõu mõjul nõutud kiiruse
booster phase . Militerm | riigikaitseterminite andmebaas . Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mil/booster%20phase/1/eng (19.07.2026)