Introduced the application of Hydraulic Roll Load Device for strip cold mill, the structure characteristic of the hydraulic cylinder, and the arrangement of servo electro-hydraulic valve and position transducer. Issued the method of parameters calculation for the hydraulic cylinder.%主要介绍了带钢冷轧机液压压下装置的应用，液压缸结构特点，电液伺服阀和位移传感器布置特点，以及液压缸主要参数的计算方法。
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