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EGR valve

noun, Automotive.

exhaust-gas recirculation

[ig-zawst-gas] /ɪgˈzɔstˌgæs/
noun, Automotive.
a method of returning part of the exhaust gases to an engine by means of a valve (EGR valve) in order to reduce the combustion temperature, which leads to a reduction in the formation of pollutants.
Abbreviation: EGR. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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