Industrial ovens in the nature of curing ovens, welding rod ovens, thermal cleaning ovens, and furnaces, not for food or beverages; combustion furnaces; burners for industrial purposes for burning ammonia and ammonia containing liquids and gases; gas burners for industrial purposes; industrial oil and gas burners for large combustion plants; structural parts of ammonia burners, namely burner lances and nozzles; burner combustion systems, namely furnaces, incinerators, combustion chambers, pre...