Replace old equipment with energy efficient heating , ventilating , and air conditioning units

把老旧设施都换成节能的暖气，通风和空气调节组件

The researchers postulated that , when the jaw moves , the sinus wall flexes , ventilating the sinuses . ( Explore the human body . )

研究者推测，当下颌移动时，鼻窦壁就会收缩，使鼻窦通风（探索人体）。

Several problems of heating and ventilating design for underground garages .

地下汽车库暖通设计中的几个问题。

Multiple fuzzy integrated evaluation for safety of mine ventilating system .

矿井通风系统安全性的多层次模糊综合评价。

It is possible to design good heating ventilating and air conditioning systems at a reasonable cost .

人们可以用合理的造价设计一个良好的采暖通风和空气调节系统。