Wiktionary
oil refining
n. The industrial process of converting crude oil into petroleum and other useful products
Usage examples of "oil refining".
These disastrous investments added to his losses in oil refining, the money pit of the Founders Inn Hotel, his jet leasing fiasco and one of England’.
It overlooked a yard so small it would have been hard put not to, as Zack loved to say, and offered a splendid view of the enormous oil refining facility across the street.
Patches of green, the haze of heavy industry away towards the River Amur - shipbuilding there, oil refining.