third-level
| maintenance
| third level | |
| avia. | 第三极 |
| maintenance | |
| gen. | 保养常识 |
| fin. | 维持费; 维护费; 业务维持费 |
| hydroel.st. од. | 维护; 保养; 维修 |
| met. | 维持 |
| space | 维修 |
| textile | 维修费 |
| |||
| 第三级的 | |||
| |||
| 第三极 | |||
|
third-level : 20 phrases in 11 subjects |
| Artificial intelligence | 1 |
| Aviation | 2 |
| China | 1 |
| Consulting | 1 |
| Economics | 1 |
| Information technology | 3 |
| Life sciences | 1 |
| Nautical | 2 |
| Space | 3 |
| Technology | 4 |
| Textile industry | 1 |