I am working for Building Mechanical Systems. Architectural Mechanical Engineers specialize in the design of heating, ventilating, air-conditioning, refrigeration (HVAC-R) plumbing, fire protection, and noise reduction for buildings.Started Channel AfreenAli in youtube 12-08-2016If you think all video information are worth for you just have to pay for coffee to support channel https://www.paypal.me/afreenali
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