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来自维基百科,自由的百科全书
高空军事跳伞(High-altitude military parachuting)是军事跳伞的一种,利用运输机在高空中投放军事人员、设备或军事器具。高空军事跳伞可仔细分为两款:高空低开(HALO,high altitude – low opening)和高空高开(HAHO,high altitude – high opening)。由于高空中缺乏氧气,因此进行高空跳伞的军人均须配戴氧气面罩,以防缺氧。
高空低开是指在高高度进行跳伞,以自由落体方式下降到低空时才打开降落伞;而高空高开指在高高度进行跳伞,并在高空中打开降落伞。后者通常只用于投放军事人员。
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