在拉钩与托槽或带环上分别挂橡皮链或弹力线形成一组方向相反、力量相等的旋转力作用于扭转牙达到矫治。

Then tie power chain or elastic line on the hook and bracket (or band) to form two identical rotated strengths, but in opposite direction, to help correct torsiversion.

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唯一能够解释机车运动的概念，是与所见到的运动相等力量的概念。

The only conception which can explain the movement of the steamer is the conception of a force equal to the movement that is seen.

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上述的相等指出当离心的力量被考虑的时候，转抵抗的相等片刻被减少。

The above equation indicates that when the centrifugal force is taken into consideration, the equivalent moment of turning resistance is reduced.

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