ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

Considering safety and lightening of intensity, the non-conservative fuzzy reliability design formulas about automobile back-axle housing were deduced by integrating probability density and function density. The forces, intensities and geometry dimension of component etc. are normal distribution, and subordinate is parabola of exponential k. Firstly, the integral change was achieved according to initial data , function imported and extent of integrated. Secondly, the number result about the non-conservative fuzzy reliability design of automobile back-axle housing with VB program in the computer was achieved by using middle-points integral calculus and Romberg integration. The results show that this program can be used in design of automobile backaxle housing for rising up level of design.  