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main cryogenic stage /ˈmeɪn kɹˌaɪəʊdʒˈɛnɪk ˈsteɪdʒ/ n

中文：主低温级

中文 · 主低温级Español · etapa principal criogénicaFrançais · étage principal cryotechnique
Meaning：Central body that ensures propulsion after the solid booster stage separates.
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Ariane rocket cutaway Ariane 5 rocket cutaway

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