Various efficient ways used to improve the service life of casting roller were introduced, including materials and mechanical properties selection, manufacture proceed and process control.

介绍了延长铸轧辊使用寿命所采取的材质和机械性能选择、制造过程、装配精度，车磨使用制度及生产过程工艺控制等方面的控制途径。

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Problems arising in the auto-control process of the fire roller shutter are being discussed in this paper and measures in solving these problems are presented as well.

对防火卷帘在自动控制过程中所出现的问题进行了分析，提出了改进措施。

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