trigonometric function
| forecast method
| trigonometric function | |
| hydroel.st. | 三角函数 |
| forecast method | |
| tech. | 预报方法 |
| |||
| 三角函数 | |||
| 三角化形去; 三冑函数 | |||
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trigonometric function : 10 phrases in 4 subjects |
| Bridge construction | 1 |
| Engineering geology | 1 |
| Technology | 7 |
| Wind Energy | 1 |