main cryogenic stage
/ˈmeɪn kɹˌaɪəʊdʒˈɛnɪk ˈsteɪdʒ/
n
English · main cryogenic stage中文 · 主低温级Español · etapa principal criogénicaFrançais · étage principal cryotechnique
意味：Central body that ensures propulsion after the solid booster stage separates.