详细描述了系统的特点和要求、分级分布式系统结构和以位总线为基础的数据通信网络。
The characteristic and requirement of the system, the distributed system structure and the data communication network which is based on the bit bus are described in detail.
双机架炉卷热轧机是复杂的控制对象，而带钢轧制过程是一个高度自动化的生产过程，其控制系统基于分布式分级递阶控制结构。
Two-Stand Hot Reversing Mill is very complex as a auto control object, and rolling process is automatic procedure, the architecture of control system base on hierarchical control structure.
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