Equivalent heat conductivity of PWB is related to the thickness of PWB, the residualratio of copper foil and the thickness of copper foil.
PWB的等效导热系数与PWB的总厚度、 铜箔剩余率及铜箔厚度有关,设计时需考虑相关因素。
2
We get valuable results about the effect of the stress ratio and residual stress on fatigue crack growth.
在应力比,残余应力对疲劳裂纹扩展的影响方面获得了有价值的成果。
3
Calculating the savings ratio is an inexact business, because it is the residual between measures of income and consumption and so tends to be revised a good deal.