ZL009 A Low-Nitrogen Burner for Controlling the Intensity of the Surface Combustion Zone (Utility Model) (Science & Technology) ZL003 A Fully Premixed Combustion Head with a Compartmentalized Low-Nitrogen Burner (Utility Model) (Science & Technology, Technology) ZL002 A Quick-Connect Device for Low-Nitrogen Combustion in Oilfield Heating Furnaces (Utility Model) (Senno Technology)