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貌似是在說一個向量的問題. 右手螺旋法則,是指把四指彎曲,大拇指打直,使得四指彎曲的方向與力的環繞方向(力繞著0點轉嘛.也可以說成是切線方向)相同,那麼大拇指所指方向就是所求向量方向(矩矢方向) 個人猜測.按照電磁學裡面的右手法則類推的
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