1)heating and ventilation system,供暖与通风系统2)heating and ventilation system,供暖通风系统3)heating and ventilating system,供暖和通风系统4)heat and vent system,采暖与通风系统5)ventilation and heating,通风与供暖6)heating and ventilating,供暖与通风
用法和例句
Taking a small natatorium in Tianjin for research object,the ventilation heating load of heating and ventilation system with hot blast and its ratio in total heating load in winter are calculated.