 |
| |||
| gravel extraction; gravel extraction Obtaining a mixture of coarse sand and small water- worn or pounded stones, (used for paths and roads and as an aggregate) from the earth | |||
| Kiesabbau: 7 短语, 1 学科 |
| 自然资源和野生动物保护 | 7 |
|
| |||
| gravel extraction; gravel extraction Obtaining a mixture of coarse sand and small water- worn or pounded stones, (used for paths and roads and as an aggregate) from the earth | |||
| Kiesabbau: 7 短语, 1 学科 |
| 自然资源和野生动物保护 | 7 |