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<正>TTC System This system is primarily based on China's exi sting threeband space TTC netwo rk,and supplemented by the very long ba seline interferometry(VLBI) astronomical measurement system. The TTC and communications system belonging to the Phase I of China Lunar Exploration Program (CLEP)is based on the existing USB space monitoring and control network. After a technological transformation, 相似文献
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The UK government's recent announcement that the British National Space Centre could not expect a budget increase has prompted much reaction in the press. The Chief Executive of British Aerospace, a leading company in the UK space industry, here offers his views on the country's future role in space. 相似文献
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气动布局是飞机设计过程中非常重要的一环,作为中航工业气动布局专家,请您谈谈飞机气动布局设计的重要性以及国内外的发展现状。艾俊强:气动布局是飞机方案设计的核心技术,气动布局方案的好坏直接影响到型号的成败。飞机气 相似文献