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 improve the operating quality of the micro rice-wheat combine harvester in hilly and mountainous areas, an air-flowing cleaning unit was designed. By means of design and calculation, the main working parts’(cleaning unit, suction tube and suction fan) structure parameters and working parameters were defined. Simulating analyses on 3D model of air-flowing field in the cleaning unit were done. The results showed that the cleaning device structure and distribution of air-flow speed met the design requirements well and the cleaning effect was good. The compared field test with the rice harvest showed that the micro combine harvester with air-flowing cleaning unit had the features of compact size and easy operation. The distribution of air-flowing velocity and pressure in the cleaning unit could meet design requirements well. Comparing to micro combine harvester without air-flowing cleaning unit, the total loss rate decreased from 3.8% to 2.34%, the damage rate decreased from 1.5% to 1.4% and the impurities rate decreased from 7.2% to 1.2%, which fell by 38.42%, 8.33% and 8333%, respectively. Every performance reached the demands to JB/T 5117—2006 well. The decline of impurities rate was particularly significant.