Backsweep can improve the efficiency at the expense of surge margin. 后掠会增加效率，但是会降低喘振裕度，而前掠有相反的趋势。
A method for on-line static voltage stability margin calculation is presented. 提出了一种可在线应用的静态电压稳定裕度计算方法。
All the working dimensions will be finally determined according to the minimum margin and calculated margin tolerances. 最后根据最小余量及计算出的余量公差确定出全部工序尺寸。
Since casing strength performance can be influenced by many factors, it is hard to confirm casing strength margin and its value. 摘要套管强度性能受多种因素的影响，如何确定套管强度余量及其大小，是一个难题。
