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

To solve the cleaning problems of portable reaper, the cleaning system test bench was designed and the wheat was chosen as the experimental object. Air flow test without material was done and analyzed the static pressure in the two stages of pipelines. The relation among the speed of first and second level winnower and the fan can be found. The test can provide the selection scope of motion parameters for the material test. In material test, the fan speed and the first and second winnower speed were selected for test factors, and the cleaning rate for test indicator. Through orthogonal test and quadratic general rotation test, the motion parameters of wheat were found out when its cleaning rate was best and the impact of individual factor on the indicator was researched by regression equation. The best motion parameters can be found through the test: when the speed of first and second level winnower and the fan was 300r/min,、764r/min,、3255r/min , the cleaning rate would be best. This combination of parameters will apply to portable reaper cleaning systems, and provide the system the reliable movement parameters.