| 摘要 |
A gas burner comprising a tube having a gas supply connection, there being a sleeve partly engaging the outside of the tube and partly spaced therefrom whereby to define a space between the sleeve and the tube presenting a gas expansion chamber, outlet ports in the tube and means placing the chamber in communication with the ports. The burner is manufactured by forming an outlet port in a tube, forming a longitudinal groove in the tube and placing a sleeve having grooves therein over the tube whereby to create the gas expansion chamber and placing the same in communication with the outlets.
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