| coalfield 隐藏摘要 |
| 煤田 |
| coal seam 煤层 coalfield 煤田 coarse texture soil 粗质地土壤 | |
| http://www.zftrans.com/favorite/vocabulary/2006-2/1/212706212127131594940.htm - 基于70个网页 |
| 相关词条 |
| exposed coalfield |
| submarine coalfield |
| concealed coalfield |
| coalfield prediction |