acid refined oil的用法和样例：
- Refined oil, the natural gas market supply stable.
- Notice regarding adjusting the price of refined oil.
- Exports of refined oil products increased 6.5% to 147.6 million euros.
- The article intruduce some method to prevent refined oil from deterioration and long for shelf-life such as nitrogen sparging,Chelation with citric acid and Prevent oil from light.