how to work expansion valve?|Hvac use and work | what's inside a thermal expansion valve | TXV -hvac

how to work expansion valve?|Hvac use and work | what's inside a thermal expansion valve | TXV -hvac
expansion valve kis tarha kam karta ha
ac gas charging gauge kasy use kary
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HVACR: how to use Ac/refrigeration gauges(manifold gauges)
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