 |
| |||
| 行进掩护; 行进间掩护 | |||
| 运动筛; 移动屏; 活动筛 (网); 活动格网; 测流屏 | |||
|
moving screen : 3 phrases in 2 subjects |
| Hydroelectric power stations | 1 |
| Technology | 2 |
|
| |||
| 行进掩护; 行进间掩护 | |||
| 运动筛; 移动屏; 活动筛 (网); 活动格网; 测流屏 | |||
|
moving screen : 3 phrases in 2 subjects |
| Hydroelectric power stations | 1 |
| Technology | 2 |