| |||
| 改进系统 | |||
| 改型装置; 改进的装置 | |||
|
modified system : 23 phrases in 12 subjects |
| Agriculture | 2 |
| Air defense | 1 |
| Aviation | 2 |
| Business | 1 |
| Chemistry | 1 |
| Electricity | 1 |
| Leather | 1 |
| Mathematics | 1 |
| Securities | 2 |
| Space | 2 |
| Technology | 8 |
| Textile industry | 1 |
| |||
| 改进系统 | |||
| 改型装置; 改进的装置 | |||
|
modified system : 23 phrases in 12 subjects |
| Agriculture | 2 |
| Air defense | 1 |
| Aviation | 2 |
| Business | 1 |
| Chemistry | 1 |
| Electricity | 1 |
| Leather | 1 |
| Mathematics | 1 |
| Securities | 2 |
| Space | 2 |
| Technology | 8 |
| Textile industry | 1 |