 |
| |||
| release spring | |||
| 安全弹簧: 42 phrases in 13 subjects |
| Architecture | 1 |
| Chemistry | 3 |
| Drilling | 1 |
| Electronics | 1 |
| General | 1 |
| Hydroelectric power stations | 2 |
| Metallurgy | 1 |
| Nautical | 2 |
| Oil / petroleum | 2 |
| Refrigeration | 4 |
| Shipbuilding | 2 |
| Space | 1 |
| Technology | 21 |
|
| |||
| release spring | |||
| 安全弹簧: 42 phrases in 13 subjects |
| Architecture | 1 |
| Chemistry | 3 |
| Drilling | 1 |
| Electronics | 1 |
| General | 1 |
| Hydroelectric power stations | 2 |
| Metallurgy | 1 |
| Nautical | 2 |
| Oil / petroleum | 2 |
| Refrigeration | 4 |
| Shipbuilding | 2 |
| Space | 1 |
| Technology | 21 |