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

For the problem of the high lose rate of rapeseed with different mature degree by the combine harvester and its short period of harvest, 4SY-1.8 rape windrower was designed ,and a new kind of combined stem conveyer, which integrates the stem convey both in longitudinal and transversal directions, was presented.The overall structure and the working principle of the main parts of a rape windrower were analyzed and the parameters of key components were confirmed such as the reel, the cutting device, the conveyer and vertical roller etc. The field test indicated that rape windrower could harvest mechanical direct-seeding rape and manual direct-seeding rape. When the windrower harvests mechanical direct-seeding rape, the upper windrowing angle and the lower angle of rape stalks are 23.6° and 17.1° respectively, and the difference between both angles is less than 10°, at the same time, the root difference is less than 0.12m. When the windrower harvests manual direct-seeding rape, the upper windrowing angle of rape stalk was is less than 5°while the lower was is less than 2°, and the difference between both angles is less than 5°, furthermore, difference between the rape root is less than 0.1m. This study indicates that swath quality could meet the requirements of the harvesting quality standards and the agronomic requirement.