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由北方十三个省(区)三十三个农机制造、科研和教学单位组成的三结合联合设计组,于1973年冬至1976年底,进行了北方旱作地区铧式犁系列设计。该系列设计的目的是为了改变北方地区铧式犁生产中严重存在着的系列混乱“三化”低,型号重复品种缺,结构陈旧用材多的问题,为这一地区30～80马力的各种拖拉机提供一个配套比较合理、品种比较齐全、技术经济指标比较先进的系列产品。目前系列产品已全部鉴定定型,并逐步
From the winter of 1973 to the end of 1976, the three-ply joint design team composed of 33 agricultural machinery manufacturing, scientific research and teaching units in thirteen provinces (districts) of northern China carried out the design of the series of plowshare in the northern dryland area. The purpose of this series of design is to change the series of serious chaos in the production of plow in the northern region “three ” low, the lack of repeated varieties, the old structure of the timber and more, for the region 30 to 80 horsepower A variety of tractors to provide a more reasonable package, the more complete varieties, technical and economic indicators more advanced products. At present, all products have been identified stereotypes, and gradually