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联合作业具有一次完成多项作业的功能，可缩短工序间隔，有利于抗旱保墒，减少拖拉机进地次数，减轻对土壤的压实，减少能源消耗，降低作业成本，可以充分利用拖拉机功率，提高劳动生产率等优点。因此，已成为国内外农业机械的发展方向和必然趋势。结合我省农业生产的实际情况和农业可持续发展的要求，我们研制了GBL-4型耕整播种联合作业机；并从整机作业方案出发，阐述了该机的技术性能、结构特点和工作原理。
Joint operations have a number of functions to complete a number of operations, can shorten the process interval, is conducive to drought and soil conservation, reduce tractor into the times, reduce the compaction of the soil, reduce energy consumption, reduce operating costs, you can make full use of tractor power and improve labor Productivity and other advantages. Therefore, it has become the development direction and inevitable trend of agricultural machinery at home and abroad. Combined with the actual situation of agricultural production in our province and the requirements of sustainable development of agriculture, we developed the GBL-4 tillage and sowing joint operation machine; and proceeding from the whole operation plan, described the technical performance, structural characteristics and work of the machine principle.