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solid booster stage /ˈsɒlɪd ˈbuːstə ˈsteɪdʒ/ n

中文：固体助推级

中文 · 固体助推级Español · etapa del propelente sólidoFrançais · étage d’accélération à poudre
Meaning：Provides the main thrust during takeoff before separating from the main cryogenic stage.
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Ariane rocket cutaway Ariane 5 rocket cutaway

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