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| 11. | axle spur wheel |
| 车轴正齿轮 |
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| 12. | involute spur gear |
| 渐开线正齿轮 |
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| 13. | internal spur gear |
| 内啮合圆柱齿轮，直齿内齿轮 |
|
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| 14. | spur bevel gear |
| 正齿伞齿轮 |
|
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| 15. | spur sb's ambition |
| 激起某人的雄心 |
|
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| 16. | spur-gear cutting |
| 正齿轮切削 |
|
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| 17. | spur friction wheel |
| 筒形摩擦轮 |
|
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| 18. | north polar spur |
| 北银极支 |
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| 19. | spur leveling line |
| 支水准路线 |
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| 20. | equivalent spur gear |
| 当量直齿轮 |
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