| |||
双位控制 | |||
开关控制 |
off -on control : 42 phrases in 12 subjects |
Architecture | 1 |
Automobiles | 5 |
Aviation | 1 |
Compressors | 2 |
Electronics | 4 |
Information technology | 1 |
Mathematics | 1 |
Metallurgy | 4 |
Oil / petroleum | 1 |
Power system protection | 1 |
Space | 5 |
Technology | 16 |