“rocket engine precooling”的概念、定义、翻译、参考文献-科学参考

单词	rocket engine precooling
释义	rocket engine precooling Encyclopedia 工学〔设计与技术〕释 rocket engine precooling发动机预冷发动机起动前对发动机低温系统进行提前冷却，并达到冷却温度或时间要求，确保发动机正常起动的技术。
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