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

In order to solve the problem of mechanical harvest of corn stubble, a roots-soil separating device of corn stubble was developed. It consisted of a double roller compacting mechanism and a dual flyweights-hit mechanism with flexible connection. The co-action of two mechanisms on corn roots-soil complex were compaction, rub, hit, impact and other ways to achieve the function of roots-soil separation. When the soil texture was medium loam and the soil moisture was 15%~20%, the test results showed that the average roots-soil separating rate was 98.12%, the roots-soil separating loss rate was 0.92% and the average efficiency reached 2.43 t/h. The device could realize the effective separation of stubble and soil. 