 |
| |||
| 展开 | |||
| fourier expansion Fourier: 5 phrases in 5 subjects |
| Bridge construction | 1 |
| Electric machinery | 1 |
| Mining | 1 |
| Space | 1 |
| Technology | 1 |
|
| |||
| 展开 | |||
| fourier expansion Fourier: 5 phrases in 5 subjects |
| Bridge construction | 1 |
| Electric machinery | 1 |
| Mining | 1 |
| Space | 1 |
| Technology | 1 |