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

Topology structure design of low-DOF parallel stable platform was studied based on POC set theory and SOC unit. Taking the 1-translation and 2-rotation (1T-2R) parallel mechanism as an example, the detail procedure for low-DOF parallel stable platform topology structure design was formulated. The SOC branches with 1T-2R output were presented, and many new 1T-2R topology structure types were obtained by arranging the suitable SOC branches. The design personnel may select the best topology structure from these obtained structure types and its topology parameters based on concrete performance indices and other design requirements. And the method has some reference for other low-DOF stable platforms or PM structure designing and election.