All stress concentration factors so far presented in this book discussed the geometric or full theoretical values. 本书内所提到的全部应力集中系数都是几何的或纯理论值。
For design calculations, it is usually adequate to use the theoretical value for the approximate mixture ratio, corrected by a typical combustion efficiency factor. 对于设计计算,采用相应混合比的理论值,并用典型的燃烧效率系数来修正,通常这样做是恰当的。