| Each refiner must submit the kerosene that he produces to systematic laboratory tests. |
| In the HSLA segment of the industry, niobium is used as a grain refiner and precipitation strengthener. |
| We are the country's largest petroleum refiner and one of the largest producers of crude oil and natural gas. |
| Debris and grit, which abrade refiner discs and machine tools, must be removed. |
| Executives at Neste, a big Finnish refiner, doubt Europe's output of biofuels can expand fast enough to meet the EU's target. |
| Some mills may choose not to recover reject refiner steam, increasing the steam demand from the power boiler. |
