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

Based on expiating the applied limitation of current CAD on internal engagement involutes gear pump, its universal optimal model allowed for user freewill modification under UG software was firstly constituted, and a particular opinion of processing discrete or integral design parameters has been raised,；secondly the optimal basic structure parameters of this universal optimal model was formed,；its solid model and followed relative analyses, emulation, drawing operations were successively created, the process was all-automatic and all-parametric. Finally the correctness and applicability of the methods and opinions have been proved to be valid by the actual examples.