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用传统的评价方法，从传热速率基本方程式出发，分析了紧凑型的板式换热器和螺旋板式换热器的结构、传热特点及发展方向。
With the traditional evaluation method, starting from the basic equations of heat transfer rate, the structure, heat transfer characteristics and development direction of compact plate heat exchanger and spiral plate heat exchanger are analyzed.