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新浪网
24d
C929一定要用国产复合材料
我国民机C909(ARJ21)、C919和CR929机身筒体试验件,所用的复合材料均是由美国进口的。为什么要用进口材料?答案是,我国没有经过适航认证的碳纤维 ...
腾讯网
1mon
中国商飞:比C919座级更大的C929已在详细设计阶段 C939正进行预研
此外,比c919座级更大的c929已在详细设计阶段。 今年珠海航展期间,中国国航与中国商飞公司签署了C929客机的首家用户框架协议,意向成为C929宽体 ...
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