normal air短语¹³¹⁶²⁰⁺³ 基本例句 n.标准空气 Experimentally tests the heat transfer performance under lower air pressure and normal air pressure. 电加热器在低压与常压下散热功率基本相等; cnki Normal air, enriched air or pure oxygen can be used to support combustion. 空气、富气、和纯氧气都可用来支持燃烧。 agoil