Surface combustion burners or radiant tile burners in comparison produce nitrogen oxides' levels 60-70% less. Therefore John Joyce's research into low NO x burners revolved primarily around surface combustion techniques. Another issue was the effect combustion temperatures have on the formation of NO x.
soup sandwich. A slang term used by members of the United States Army to describe a fellow soldier whose performance is unsatisfactory. This term is often shortened to just soup.. The term expresses a state of extreme uselessness, which can be understood by considering the functionality and worth of soup between two slices of bread.
Potbelly (also known as Potbelly Sandwich Works) is a sub sandwich restaurant chain. Potbelly prices are similar to that of its competitors such as Subway, Quiznos, and Jimmy Johnâs. Although other sub restaurants have many bread options, Potbelly only makes subs out of multigrain wheat or regular bread.