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为适应农田基本建设需要,凌源县农机所和县农机修造厂于1974年共同研制推土铲运机,经过反复试验改进,1975年试制的第四代样机(见图1)已完成了近三
In order to meet the needs of farmland construction, Lingyuan County Agricultural Machinery Factory and County Agricultural Machinery Repair Factory jointly developed bulldozers in 1974. After repeated tests and improvements, the fourth-generation prototype (see Figure 1) three