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正弦波通量图 |
sine- wave : 66 phrases in 11 subjects |
Air defense | 9 |
Aviation | 3 |
Bridge construction | 1 |
Electric machinery | 5 |
Electronics | 8 |
General | 1 |
Hydroelectric power stations | 2 |
Oil / petroleum | 2 |
Space | 3 |
Technology | 31 |
Telecommunications | 1 |