oxygen-enriched air

• 富氧空气

oxygen-enriched air的用法和样例：

例句

1. However, direct use of oxygen, or enrichment of the air with oxygen, is necessary for some processes.
   但是对于某些过程，直接使用氧或富氧空气是必要的。
2. Occasionally enriched air or supple mental oxygen is available and a greater ratio of secondary reforming to primary reforming is possible.
   偶尔有富氧空气或补充氧的，因而二段转化对一段转化的大比例是可能的。