龙江号SPY—3型牵引式液压平地机,是为了满足平整土地,施行灌溉,迅速扩大高产稳产农田面积的需要而研制的。从一九七三年八月试御第一台样机,经过多次试验和改进,机具性能较好,使用可靠,现已由我省初步定型(图1)。用途和适用范围 SPY—3型平地机可与带有液压悬挂机构的东方红—75(54)或铁牛—55拖拉机配套,进行较大面积农田的平整土地,改旱田为水浇 Longjiang SPY-3 traction hydraulic grader, is to meet the needs of the formation of land, irrigation, rapid expansion of high and stable production of farmland area developed. From August 1973 to test the first prototype, after many tests and improvements, better performance tools, reliable use, has been initially shaped by the province (Figure 1). Application and Scope SPY-3 grader can be used with Dongfanghong-75 (54) or tractor -55 tractor with hydraulic suspension to make the land of larger area farmland and change dry field to watering