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该文介绍了 PLC控制变频变压调速电梯控制系统,它运行舒适感好,平层精度高,节电效果显著,故障率低.“,”CONTROLLED BY PLC,THE FREQUENCY CONVERTIBLE AND TRANSFORMABLE ELEVATOR WHICH IS INTRODUCED IN THIS PAPER,IS COMFORTABLE TO BE USED AND HAS PRECISION EVEN LAYER. THE EFFICIENCY OF ITS SAVING ELECTRICITY IS PROMINENT, AND IT HAS A LOW MALFUNCTION RATE.