steam generating apparatus, burners for industrial purposes, furnace boilers, boiler tubes and valves therefor

Burners, namely, gas burners, oil burners for industrial and commercial use; boiler burners; refinery furnace burners; hot-gas generator burners; thermal afterburners, namely, thermal oxidizers for industrial air pollution control; flame stabilizing apparatus being parts of gas burners; flame holders being parts of gas burners

Gas burners; gas firing burners, namely, gas burners; boiler gas burners; refinery gas furnace burners; hot gas generator burners; post-combustion gas burners; flame stabilizers and flame holders being structural parts of gas burners