oxygen masks短语⁶¹⁵²⁸ 基本例句 na.氧气面罩;🌏氧气口罩原型oxygenmask的复数 Analysis of the result showed the oxygen masks had serious comfort and seal defects, which were mainly caused by the un- fitness between masks and faces. 分析表明,现面罩的舒适性和气密性存在较严重的问题,主要原因是面罩体造型与飞行员面型不符; d.wanfangdata.com.cn