In this study. a novel triple air-staged combustion (ASC) with internal flue gas recirculation (FGR) was proposed to further achieve low NOx emissions and high combustion efficiency in the I-type radiant tube (RT). The effects of air vent structural parameters. including secondary air vent gap d (0. https://www.ealisboa.com/limited-deal-SMOK-RPM-C-Replacement-Coils-5-Pack-flash-buy/