Aviation Dictionary
فشار معکوس، فشار اگزوز موتورهای پیستونی که مانع تخلیه گازهای سوخته شده از سیلندرها میشود
The pressure inside the exhaust system of a reciprocating engine that prevents complete scavenging of the burned gases from the cylinders. Back pressure is caused by mufflers and such power-recovery devices as turbochargers and power-recovery turbines (PRT).