while-ac-stands-for-air-conditioning

<img src="http://image.baidu.com/search/http:%5C/%5C/pix10.agoda.net%5C/hotelimages%5C/199%5C/1997191%5C/1997191_17021715390051093764.jpg?s=1024×768" alt="070408 060206 0604070107 06010507″ style=”max-width:450px;float:left;padding:10px 10px 10px 0px;border:0px;”>While AC stands for “air conditioning,” HVAC stands for “heating, ventilation ... اقرأ أكثر