Use: Test the flatness of plate, leveling ruler, machine tool working platform, guides and precision work-piece.
用途：检测平板、平尺、机床工作台、导轨和精密工件的平面度、直线度。
The working principle, control system structure of the lower roll moving device on a 3-high plate coiling machine, mathematical model simplification and analysis are introduced.
介绍了新设计的三辊卷板机的工作原理、下辊位置控制系统的组成、数模简化与分析等。
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