低氧仅是一种可降低空气中氧的容积百分比，从而获得额定低氢分压混合气体的仪器。据可查资料表明，目前只有俄罗斯、瑞士等国家生产这一仪器，并已借助低氧仪用于医学临床治疗、保健康复、特殊人才（如运动员、宇航员、潜水员等）的培养及全民健身活动和水果蔬菜保鲜贮存等领 Hypoxia is only an instrument that reduces the volumetric percentage of oxygen in the air to obtain a nominal low hydrogen partial pressure gas mixture. According to available data, it is currently only Russia, Switzerland, and other countries that produce this instrument, and has used the hypoxic instrument for clinical medical treatment, health rehabilitation, training of special talents (eg athletes, astronauts, divers, etc.) and national fitness. Activities and preservation of fresh fruits and vegetables