 |
| |||
| contamination prevention; conservancy (des Wassers) | |||
| pollution prevention | |||
| purification | |||
| keeping clean | |||
| pollution abatement; pollution control | |||
| clean keeping (of cultivation); conservancy; conservation; quality maintenance | |||
|
Reinhaltung : 13 短语, 10 学科 |
| 一般 | 2 |
| 农业 | 1 |
| 化学 | 1 |
| 啤酒厂 | 1 |
| 地质学 | 1 |
| 建造 | 1 |
| 汽车 | 1 |
| 环境 | 3 |
| 电子产品 | 1 |
| 自然资源和野生动物保护 | 1 |