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| 21. | caterpillar traction |
| 履带牵引 |
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| 22. | pulling phenomenon |
| 牵引现象 |
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| 23. | power at the drawbar |
| 牵引功率 |
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| 24. | backward haulage |
| 逆向牵引 |
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| 25. | traction substation |
| 牵引变电所 |
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| 26. | tugging at the oars. |
| 牵引船桨 |
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| 27. | adhesion traction |
| 粘附牵引 |
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| 28. | axis of traction |
| 牵引轴 |
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| 29. | funicular traction |
| 缆索牵引 |
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| 30. | restraining effect |
| 牵引效应 |
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