从横流式和逆流式冷却塔的结构特点出发，探讨以结构优化方式改造冷却塔的途径。
Based on the structure features of transverse and counter flow type cooling towers, revamping for cooling tower through structure optimization was explored.
结果表明：横流式混合换热器要优于逆流式混合换热器。
Results show: the transverse mixed heat exchanger is better than the contranatant mixed heat exchanger.
从1985年至今，顺流式、逆流式、横流式以及混流式谷物干燥机的研究已经取得了成功。
Since 1985, research on simulation and modeling of concurrent flow, counter flow, cross flow, mixed flow grain dryers had been accomplished.
从1985年至今，顺流式、逆流式、横流式以及混流式谷物干燥机的研究已经取得了成功。
Since 1985, research on simulation and modeling of concurrent flow, counter flow, cross flow, mixed flow grain dryers had been accomplished.
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