亚洲一区欧美在线,日韩欧美视频免费观看,色戒的三场床戏分别是在几段,欧美日韩国产在线人成

The differences of corn planting-harvesting process and harvesting equipment between China and developed countries, corn harvester developing process and major model were introduced. The general technology and equipment of snapping, husking and straw treatment of corn harvesting machine, and the research and exploration of corn harvesting technology regardless of row in China were expatiated. The major factor for restricting development of corn harvest mechanization in China, the development trend of foreign corn harvester, and planting and harvesting characteristics of Chinese corn producing areas were analyzed. Finally, it pointed out that the corn harvester should be designed with combination of agricultural machinery and technology to suit local condition in China.