 |
| English | Chinese |
| coal refining The processing of coal to remove impurities | 煤的精化 (去除煤中的杂质的过程。) |
| oil refining The separation of petroleum mixtures into their component parts | 炼油 (石油混合物分离成其组成部分。) |
|
| English | Chinese |
| coal refining The processing of coal to remove impurities | 煤的精化 (去除煤中的杂质的过程。) |
| oil refining The separation of petroleum mixtures into their component parts | 炼油 (石油混合物分离成其组成部分。) |