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一、序言在各种微型计算机系统中,用磁盘作为外存储器已经十分普遍。然而,在某些简易数据采集和控制系统中,往往采用单
First, the preface In a variety of micro-computer systems, the use of disk as an external memory has been very common. However, in some simple data acquisition and control systems, often single