gaaskeevitusel kasutatav leek, millel puudub nii oksüdeeriv kui taandav toime (vrd oksüdeeriv leek, süsinikrikastav leek, taandav leek), a gas flame in which there is no excess of either fuel or oxygen in the inner flame: an oxyfuel gas flame that is neither oxidizing nor reducing (compare: oxidizing flame, carburizing flame, reducing flame)