Kjeldahl means by measuring the nitrogen content and the use of nitrogen and protein conversion factor to calculate the total amount of protein contained in dairy products. 凱氏定氮法，是指通過測量氮元素的含量，並利用氮元素與蛋白質換算係數，來計算乳製品中所含蛋白質總量的方法。
Because of the high spinning rate, a small fluctuation in the scale factor of the gyros will cause marked errors in the spinning angle, which invalids the measurement. 因為火箭彈的自旋角速度較高，所以陀螺標度因子的微小變化將引起自旋角度很大的測量誤差，使測量結果失去意義。
