【摘要】 为了改进圆形和方形截面的杆式中耕机的入土性能并减少其牵引阻力，设计了十字形和三角形截面两种新型工作部件，并在实验室土槽内对４种形状的工作部件的土壤反作用力进行了测试。十字形截面的工作部件所受到的牵引阻力和垂直支反力最小，具有良好的入土性能，优于其他形状的工作部件。更多还原

【Abstract】 Fluted and triangle rods were desinged and tested in comparision with round and square rods in a laboratory soil bin for the purpose of improving the rod weeder’s penetration and reducing it’s draft. Among the four types of rods tested,the fluted rod had the least draft and vertical reaction force.更多还原