Backsweep can improve the efficiency at the expense of surge margin. 后掠會增加效率，但是會降低喘振裕度，而前掠有相反的趨勢。
A method for on-line static voltage stability margin calculation is presented. 提出了一種可在線應用的靜態電壓穩定裕度計算方法。
All the working dimensions will be finally determined according to the minimum margin and calculated margin tolerances. 最後根據最小余量及計算出的余量公差確定出全部工序尺寸。
Since casing strength performance can be influenced by many factors, it is hard to confirm casing strength margin and its value. 摘要套管強度性能受多種因素的影響，如何確定套管強度余量及其大小，是一個難題。
