Airaccumulation in the condenser owing to insufficient output of air extractor can increase the terminal temperature difference and the air pressure component.
In the twenty years that the Clean Air Act has mandated unleaded gas use in the United States, the lead accumulation worldwide has decreased significantly.
在《清洁空气法案》强制要求美国使用无铅气体的二十年里，铅在世界范围内的累积量显著下降。
3
Intense physical effort or close-fitting clothing, which limits the necessary air and moisture exchange, leads to an accumulation of heat.