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| 表面负摩擦; 负摩擦力; 负表面摩阻力 | |||
| 表面负摩擦力; 負摩擦力 | |||
| 负摩阻力; 负摩擦力 (桩工); 负表面摩擦; 表面负摩阻; 负表面摩擦桩基 | |||
| negative skin friction: 4 phrases in 2 subjects |
| Oil / petroleum | 1 |
| Technology | 3 |
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