现型拖拉机的轮子在一般水田烂泥里行走所消耗的马力要比铁轮在铁轨上行走大139倍;且轮子多次滚压土壤要破坏硬土层因而不能持续工作。据此,笔者从1958年起就研究阔幅桁架式“架空作业机”1960年的设计示意图是如图所示,农具是在一个跨距为15m的“轨道车”上的两平行空心矩形管轨道上行走。轨道车的四个轮子是同一规格的充气胶轮,每一个胶轮 The wheels of an existing tractor’s wheels consume 139 times more horsepower than iron wheels on railroad tracks, and the wheel’s repeated rolling of the soil destroys the hard soil and cannot continue to work. Based on this, the author has studied the schematic diagram of the design of the 1960 truss type “overhead working machine” since 1958. The agricultural tool is two parallel hollow rectangular tubes on a “railcar” with a span of 15m. Walking on the track. The four wheels of the railcar are inflatable rubber wheels of the same specification. Each rubber wheel