291 With the temperature unchanged, the air is made to reach condensation by adding water.
291 With the temperature unchanged, the air is made to reach condensation by adding water.
在温度不变时，通过加入水汽而使空气达到饱和。
291 With the temperature unchanged, the air is made to reach condensation by adding water.
在温度不变时，通过加入水汽而使空气达到饱和。