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介绍了利用可编程序控制器控制的钢制三通液压胀形机液压系统的组成及工作原理，及其采取的一些节能措施。并介绍了采用ＣＡＤ软件设计液压集成块的优越性。
The composition and working principle of hydraulic system of steel three-way hydraulic bulge machine controlled by programmable logic controller are introduced, and some energy-saving measures are taken. The advantages of using CAD software to design hydraulic manifold are introduced.