 |
| |||
| 安全阀弹簧 | |||
| 安全阀簧 | |||
| safety valve spring: 15 phrases in 8 subjects |
| Chemistry | 1 |
| Drilling | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Nautical | 1 |
| Oil / petroleum | 2 |
| Refrigeration | 1 |
| Technology | 7 |
|
| |||
| 安全阀弹簧 | |||
| 安全阀簧 | |||
| safety valve spring: 15 phrases in 8 subjects |
| Chemistry | 1 |
| Drilling | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Nautical | 1 |
| Oil / petroleum | 2 |
| Refrigeration | 1 |
| Technology | 7 |