Gami DX AHU unit Mechanical expansion valve replacement and gas charging। #hvac #technical
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HVAC piping of FAHU and instalation of side gilass, filter, thermostatic expentiin valve Part 1
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URDU HINDI ME | Mechanical Expansion valve brazing easily||Expansion valve aasani se change karen||
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Air Handling Unite How to store Gas? Gas charging R407C Urdu/Hindi
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