 |
| |||
| 扫描时间; 有效扫描时间 | |||
| 激活时间 | |||
| 有效时间 | |||
| 服役时间 | |||
|
active time : 36 phrases in 13 subjects |
| Automobiles | 6 |
| Aviation | 1 |
| Business | 3 |
| Communications | 1 |
| Electric machinery | 2 |
| Electronics | 1 |
| Information technology | 1 |
| Reliability | 4 |
| Space | 5 |
| Technology | 3 |
| Telecommunications | 7 |
| Television | 1 |
| United Nations | 1 |