| 摘要 |
A burner assembly comprises a burner tube and a nozzle assembly used as a source of fuel and air for the burner tube. The burner tube is cylindrical and extends longitudinally about an axis, The burner tube includes two flame grids, each of which is located around the outside periphery of the burner tube and which supports a blue flame. A series of flame retention barriers are mounted about the periphery of the burner tube adjacent the flame grids.
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