total duration
of a | rectangular impulse current
| total duration | |
| avia. | 总历时 |
| rectangular impulse current | |
| pow.el. | 方波冲击电流 |
| |||
| 总历时 | |||
| 总持续时间; 累计时间 | |||
|
total duration : 5 phrases in 3 subjects |
| Demography | 1 |
| Hydroelectric power stations | 2 |
| Technology | 2 |