As well as his sporting career, Keating has worked for many years for the petroleum oil company Esso.
12.
At about the same time though, petroleum oil was discovered in Pennsylvania, which caused whale oil prices to crash.
13.
The patents were highly important at first, but became worthless by the development of petroleum oil wells in Pennsylvania.
14.
Strategic materials such as aluminium for airframes and petroleum oil for fuel were in limited supply and soon became scarce.
15.
Salomon Inc . said it reached a definitive agreement to sell its Basis Petroleum oil refining unit to Valero Energy Corp.
16.
One of the few resources not in short supply was petroleum oil; supplies intended for Europe were filling British storage facilities.
17.
Despite its toxicity, a considerable fraction of petroleum oil entering marine systems is eliminated by the hydrocarbon-degrading activities of microbial communities.
18.
It is used for transporting petroleum oil from Southeast Mananda oil field in the Southern Highlands Province of Papua New Guinea.
19.
He then began to study the catalysis of petroleum oils and had some success in converting vaporized petroleum oil to gasoline.
20.
He then began to study the catalysis of petroleum oils and had some success in converting vaporized petroleum oil to gasoline.
