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文章结合河南省农业科研系统多年进行农业科技成果示范推广的实践，阐述了开展科技示范推广工作的作用与效果以及采取的措施与方法。
Combining with the practice of agricultural science and technology demonstration and extension in Henan agricultural research system for many years, this paper expounds the role and effect of scientific and technological demonstration and extension work and the measures and methods adopted.