preplanned
| product improvements
| preplanned | |
| econ. | 预先计划的 |
| product improvement | |
| adv. | 产品改良 |
| avia. | 产品改进 |
| el. | 产品改型 |
| |||
| 预先计划的 | |||
|
preplanned : 19 phrases in 7 subjects |
| Air defense | 1 |
| Aviation | 5 |
| Electronics | 3 |
| Information technology | 1 |
| Scientific | 1 |
| Space | 4 |
| Technology | 4 |