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| 31. | protection, stopping protection against wire fracture, limiting device for maximum load, control device for maximum |
| 升降平稳、噪音低，并设有举升托架、防跌落支承保险、钢索断裂制动保险；最大负荷限定装置和托臂回转角度锁定装置。 |
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| 32. | With the loss of the alveolar height, the maximum equivalent stress and the principle stress of the upper |
| 结果：随着牙槽骨高度的降低，上中切牙牙周膜最大等效应力和主应力逐渐增大。 |
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