sloping twin-spar frame in thin wall box section cast aluminium, with reinforcement cross-ribbing.
坡双梁框架薄壁箱节铸铝,以加强跨罗纹。
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sloping twin-spar frame in thin wall box section cast aluminium, with reinforcement cross-ribbing.
坡双梁框架薄壁箱节铸铝,以加强跨罗纹。
互联网摘选
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