1. Later, operation was on the Pittsburgh and Lake Eire Railroad using residual oil fuel. 2. It was bunker C oil a heavily residual oil which made it more difficult. 3. With proper treatment, crude and residual oil have been used. 4. This reduces the residual oil saturation and improves the macroscopic efficiency of the process. 5. Chemical data implied that the substance might be residual oil leaking from the wreckage. 6. The company shut off the pipeline but residual oil continued to gush from the pipe. 7. The problem : the filter contains about a quart of residual oil under pressure, which then overflows. 8. She said the pipeline was carrying residual oil and the fire was yet to be put out. 9. Residual oil present at the bottom of the column is known as reduced crude oil ( RCO ).10. Oils that are used include heavy residual oil ( HRO ), animal fats, vegetable fats, and synthetic fats.
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