在气动控制系统中,通常要知道串联节流管路中间室的压力,这个压力是用来驱动象气缸和马达等执行元件的。利用逼近法能找到中间压力,但如果没有计算器和电子计算机,这个方法要消耗很多时间。本文介绍的两个图能够直接查到中间压力P_o。图1是用于比热为1.4的双原子气体,如空气、氮、氧、氢和二氧化碳等。图2是用于 In pneumatic control systems, it is often necessary to know the pressure in the series throttling line intermediate chamber, which pressure is used to drive actuators such as cylinders and motors. The approximation method can find the intermediate pressure, but this method consumes a lot of time without a calculator and a computer. This article describes the two maps can be directly found in the intermediate pressure P_o. Figure 1 is a diatomic gas for specific heat of 1.4, such as air, nitrogen, oxygen, hydrogen and carbon dioxide. Figure 2 is for