flyrock risk
| analysis method
| flyrock risk | |
| expl. | 飞石引发的危险 |
| analysis method | |
| bridg.constr. | 分析法 |
| busin. | 分析方法 |
| |||
| 飞石引发的危险 | |||
|
flyrock risk : 4 phrases in 1 subject |
| Explosives and Explosive Ordnance Disposal | 4 |