中国10年铸“冰箭”:长征五号圆大火箭之梦

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3月23日,我国正在研制的长征五号运载火箭,在北京成功进行了芯一级动力系统第二次试车。这就意味着长征五号最难关键技术取得重大突破,为其年内转入发射场合练、2016年实现首飞打下了坚实基础。
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