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crossover frequency | |||
inversion frequency |
转换频率 : 52 phrases in 14 subjects |
Air defense | 4 |
Automobiles | 1 |
Aviation | 2 |
Computer networks | 1 |
Earth sciences | 1 |
Electronics | 26 |
General | 1 |
Geophysics | 1 |
Information technology | 3 |
Mathematics | 1 |
Metallurgy | 1 |
Space | 5 |
Technology | 4 |
Telecommunications | 1 |