safe in
| operation
| safe in | |
| baseb. | 安全返垒 |
| operation | |
| gen. | 运作 |
| hydroel.st. | 运行; 管理 |
| hydroel.st. од. | 操作 |
| IMF. | 经营; 操作 |
| math. | 函数; 运算 |
| sport. med. | 手术 |
| wind. | 处理 |
| |||
| 安全返垒 | |||
|
safe in : 19 phrases in 12 subjects |
| Chemistry | 1 |
| China | 1 |
| Commerce | 1 |
| Economics | 2 |
| General | 2 |
| Hydroelectric power stations | 2 |
| Nautical | 1 |
| Project management | 2 |
| Scientific | 1 |
| Shooting sport | 1 |
| Technology | 4 |
| United Nations | 1 |