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| 21. | Let the center of the global coordinates be chosen at the center of the shaft. |
| 将总坐标的中心选于升降机井的中心处。 |
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| 22. | Driving power for the cutting tool comes from the rotation of the spindle, which is a hollow shaft that rotates in bearings. |
| 刀具的驱动力来自主轴的旋转，主轴则是一根在轴承中旋转的空心轴。 |
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| 23. | Tom's heart gave a great thump, and he ran like the wind to the shaft. |
| 汤姆的心怦的一跳，像一阵风似地奔到矿井。 |
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| 24. | Find the required length of key based on the torque value of the gross shaft. |
| 根据整根轴的扭矩值求需要的键长。 |
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| 25. | As the piston descended, a ratchet engaged the piston rod and engine shaft and thus power was transmitted. |
| 当活塞下行时，棘轮连接活塞杆和发动机轴，因此将功率输送出去。 |
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| 26. | The archergoddess discharged a shaft with fatal aim. |
| 女神箭手射出了万无一失的箭，命中目标。 |
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| 27. | Copper wires are carried back from the rotating terminals to the individual sliprings along grooves in the outside of the shaft. |
| 铜导线从旋转凸块沿着轴外部的凹糟引回到各个滑环上去。 |
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| 28. | Generally, two screws are placed in the hub: one screw bears on the key and the other bears on the shaft. |
| 一般在轮毂内装有两个螺钉，一个螺钉压在键上，另一个则压在轴上。 |
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| 29. | He felt fate throw another shaft. |
| 一下子他感到命运又向他投掷出一支矛枪。 |
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| 30. | A shaft of sunlight smote the over-curl, and I caught a glimpse of translucent, rushing green, backed by a milky smother of foam. |
| 一线日光冲破了高飞的浪花，我瞥见冲过来的半透明的绿色，掩映着乳白色的纷飞的浪花。 |
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