“Proton D family upper stage”的概念、定义、翻译、参考文献-科学参考

单词	Proton D family upper stage
释义	Proton D family upper stage Encyclopedia 工学〔运载火箭分类〕释 Proton D family upper stage“质子”号D系列上面级俄罗斯研制的一个系列上面级，“质子”号D系列上面级与“质子”号运载火箭组合用于执行卫星发射任务。
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