IMAX纪录片《直升机在行动 Straight Up Helicopters in Action 2002》英语中字-高清完整版下载
https://cdn.6867.top:6867/1AA/attachment/forum/wushi2/wp-content/uploads/2017/03/imax-straight-up-helicopters-in-action.jpg《直升机在行动 Straight Up Helicopters in Action 2002》
本片向人们展示直升机在当今民用和军事行动中扮演的的重要角色。
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《直升机在行动 Straight Up Helicopters in Action 2002》
直升机是飞机的一种，其最大特点是以一个或多个大型水平旋转的旋翼提供向上升力。直升机可以垂直升降，也可以停留在半空不动（悬停），或向后飞行，这一突出特点使得直升机在很多场合大显身手。直升机突出的反坦克能力更是是它成为现代战争不可缺少的一环。直升机的缺点是旋翼阻力大，速度低，耗油量高，航程短，在战争中雷达反射面积大，易遭受地面单兵作战武器的袭击。
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《直升机在行动 Straight Up Helicopters in Action 2002》
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《直升机在行动 Straight Up Helicopters in Action 2002》
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《直升机在行动 Straight Up Helicopters in Action 2002》
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《直升机在行动 Straight Up Helicopters in Action 2002》
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《直升机在行动 Straight Up Helicopters in Action 2002》
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《直升机在行动 Straight Up Helicopters in Action 2002》
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