fire refining process

例句：

1. 1. The refinery uses a fire refining process to convert coal into gas and oil.
   炼油厂使用一个炼焦过程将煤炭转化为气体和石油。
2. 2. The company has invested heavily in the development of new technologies for improving the fire refining process efficiency.
   该公司在提高炼焦过程效率的新技术开发方面投入了大量资金。
3. 3. The refinery's fire refining process is crucial for producing high-quality petroleum products.
   炼油厂的炼焦过程对于生产高质量的石油产品至关重要。