 |
| |||
| 安全温度 | |||
| safe temperature: 6 phrases in 5 subjects |
| Electric machinery | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Metallurgy | 1 |
| Technology | 2 |
| Textile industry | 1 |
|
| |||
| 安全温度 | |||
| safe temperature: 6 phrases in 5 subjects |
| Electric machinery | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Metallurgy | 1 |
| Technology | 2 |
| Textile industry | 1 |