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 take advantage of the characteristics of growth and maturity of rape, overcome the disadvantage of high loss ratio and power consumptive of rape combine harvester, 4SY-1.8 type rape windrower was investigated. The novel windrower was designed for matching to walking tractor to meet both agro-mechanization and rape planting actuality in southern China. The design and construction characteristics of cutting, dividing, laying and hitching unit and considerations in the migration of rape stalks were analyzed. The results of field experiment showed that the windrower could complete the work of middle dividing and laying on both sides efficiently. The mean laying angle of rape stalk was 36.4°, which was less than 45°with 75.8% probability. The mean width of the piled stalk was 1072.6mm, which was less than 1150mm with 81.1% probability. The mean of stubble height was 278.2mm, which was between 230mm and 330mm with 85.2% probability. The test results indicated that it had a rational design and reliable function and its working quality can be easily met the agricultural requirement.