A partly enclosed , directly heated surface from which warm air circulates by convection 对流式加热机一个部分被封闭，暖空气在其直接加热的表面上通过对流进行循环的装置
Here , warm air flows up from the gulf of mexico in the spring and summer and crashes into cold air pushing down from canada 春夏两季，暖气流从墨西哥湾登陆，与加拿大的强大冷气流相撞。
Moreover the company still conducts a washer to maintain , electric wire electric circuit and water warm air piping of whole change 另外公司还经营洗衣机维修，电线电路和水暖气管道的整改。
Moreover the company still conducts a washer to maintain , electric wire electric circuit and water warm air piping of whole change 另外公司还经营：洗衣机维修，冰箱冰柜维修，改水改电和水暖气管道的整改。
The warm air from the defrosting vent for the front windshield cools rapidly as it dissipates throughout the rest of the car 即使当把热空气吹向司机和乘客的脚和脸部的暖气打开时，除霜口仍可以很有效率地工作。
D ) the warm air from the defrosting vent for the front windshield cools rapidly as it dissipates throughout the rest of the car 即使当把热空气吹向司机和乘客的脚和脸部的暖气打开时，除霜口仍可以很有效率地工作。
It works on the principle that the speed of sound changes with temperature , i . e . sound travels faster in warm air than in cold air 它利用声波速度会随温度改变的原理运作，即是声波在暖空气中传送较在冷空气中为快。
There are two methods to development plateau oil - fired warm air heater . one is experimentation ; the other is numerical simulation 对高原燃油暖风机的研究可以通过实验方法来完成，也可以通过数值模拟的方法实现。
