| |||
脉宽调制 |
width-pulse modulation : 53 phrases in 13 subjects |
Air defense | 7 |
Automobiles | 2 |
Aviation | 3 |
Earth sciences | 1 |
Ecology | 3 |
Electronics | 14 |
Geophysics | 3 |
Hydroelectric power stations | 1 |
Information technology | 1 |
Radio | 1 |
Space | 9 |
Steel production | 1 |
Technology | 7 |