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

Three structure and operation parameters which had effect on vertical axial-flow corn single panicle thresher were optimized. The quadratic rotary orthogonal experiments were carried out. Taking linear velocity of threshing cylinder, negative pressure value of fan, moisture content of cluster as effect factors, and broken rate, impurities, loss of entrapped grains, gettering drift loss as objective function, the structure size and operation parameters were experimented and optimized design. The result showed that when the linear velocity of threshing cylinder was 4.6~5.5m/s, the moisture content of cluster was 14.4%~15.9%, the negative pressure value of fan was 6.3MPa, the broken rate was less than 1.1%, impurities rate was less than 0.86%, loss rate of entrapped grains was less than 1.1%, and gettering drift loss rate was less than 0.44%. This experiment’s analysis could provide theory basis for the optimization design and operation parameter selection for the vertical axial single panicle threshing corn product.