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 the mechanical study of the ultrasonic magnetic abrasive finishing (UMAF) and analyzing the mathematics cutting model of the traditional magnetic abrasive finishing (MAF), the effects of the ultrasonic vibration on the finishing efficiency of the traditional MAF was discussed. It has been found that the process parameters, the spindle speed, the ultrasonic vibration power as well as the gap between the magnetic pole and the work piece surface, were the key factors in deciding the finishing quality and efficiency of the UMAF. Then, with a numerical control machine and its NC codes for machining a free surface of a work piece, by the software and database technologies, a new control system was designed which could control the process parameters in the UMAF polishing proceeding. Finally, the experiments have showed that the system could implement the UMAF control automatically.