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三通挡板阀是国内首次自行研制并投入运行的新产品。文中介绍它的工作原理、主要结构及技术特点，并指出改进方向及应用前景。
Three-way baffle valve is the first time developed its own new products and put into operation. The article describes its working principle, the main structure and technical characteristics, and points out the direction of improvement and application prospects.