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(三) 以旱田地区为主使用的拖拉机 当前较受欢迎的产品是铁牛-55,东方红-28和东方红-75,这些机型属于四、五十年代的产品,结构不够完善,性能指标落后。因此,积极改进这些老产品、研制新一代产品实
(3) The most popular products for tractors mainly used in dryland areas are Tieniu-55, Dongfanghong-28 and Dongfanghong-75. These models belong to the 40s and 50s and their structures are not perfect. Indicators are behind. Therefore, actively improve these old products and develop new generation products.