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1 现场总线的崛起自动控制领域的发展过程 (1) 50多年前第一代过程控制体系基于5-13psi的气动信号(直动式或PCS),这是一个就地控制机械自动化的年代。
1 The Rise of Field Bus Development Process in Automation (1) More than 50 years ago the first-generation process control system was based on 5-13psi pneumatic signals (direct acting or PCS), an era of in-situ control of mechanical automation.