| |||
| ★ 活动层; 融冻层 | |||
| 活土〔作用，融冻〕层 | |||
| 冻土活动层; 冻融层 | |||
| 活性层 | |||
| 活性层地基土; 冻融活性层 | |||
| 有效层 | |||
| 激活层; 活土层; 活化层; 作用层; 冻胀土层; 地面土层变动层; 充气活化层 | |||
|
active layer : 18 phrases in 6 subjects |
| Bridge construction | 1 |
| Cryosphere | 1 |
| Earth sciences | 1 |
| Electronics | 13 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Technology | 1 |