The backpressure in an internal-combustion engine or a boiler.
Powder residue that is released upon automatic ejection of a spent cartridge or shell from a firearm.
The effect caused by recirculation into the source country of disinformation previously planted abroad by that country's intelligence service in an effort to mislead the government of another country.
the backward escape of gases and unburned gunpowder after a gun is fired
2.
misinformation resulting from the recirculation into the source country of disinformation previously planted abroad by that country's intelligence service