| |||
| 稳定性问题 | |||
| 安定性问题 | |||
|
stability problem : 13 phrases in 4 subjects |
| Air defense | 1 |
| Bridge construction | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Technology | 9 |
| |||
| 稳定性问题 | |||
| 安定性问题 | |||
|
stability problem : 13 phrases in 4 subjects |
| Air defense | 1 |
| Bridge construction | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Technology | 9 |