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| 天然边坡角; 静止角 | |||
| 安息角 | |||
| 自然倾斜角; 自然坡角; 天然休止角; 天然倾斜角; 松散体的天然坡角 | |||
| natural angle of slope: 2 phrases in 2 subjects |
| Electronics | 1 |
| Technology | 1 |
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