 |
| |||
| countdown; counting-down | |||
| pulse frequency dividing | |||
| counting down | |||
|
脉 冲 分频 : 35 phrases in 10 subjects |
| Air defense | 5 |
| Aviation | 1 |
| Construction | 1 |
| Earth sciences | 2 |
| Electronics | 8 |
| General | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 2 |
| Space | 3 |
| Technology | 10 |
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