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harmonic number |
谐波 数 : 40 phrases in 11 subjects |
Agriculture | 1 |
Air defense | 1 |
Electric machinery | 6 |
Electronics | 6 |
Hydroelectric power stations | 1 |
Information technology | 1 |
Mathematics | 3 |
Radio | 1 |
Space | 2 |
Technology | 16 |
Telecommunications | 2 |