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.
A bacon, egg and cheese sandwich is a breakfast sandwich popular in the United States. The sandwich is typically made with bacon, eggs (typically fried or scrambled), cheese and bread, which may be buttered and toasted. Many similar sandwiches exist, substituting alternate meat products for the bacon or using different varieties of cheese or bread.