pressure-change chart

The article particularizes the theory, configuration and use ways of turnover drill press clamp under the control of PLC. And finally shows the trapezoid drawing of PLC and hydraulic pressure chart.

详细说明了基于PLC控制的自动翻转夹具的原理、结构和使用方法，并结合实例给出了PLC的梯形图和液压原理图。

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Note pressure differential and enter flow rate chart at pressure differential noted.

注意所标注的压差和对应压差的进口流量表.

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This paper analyses the oil, gas and water saturation of two wells of core drilling with keeping formation pressure in Daqing Placanticline and draws a degassed correction chart of oil and water saturation.

通过对大庆长垣两口保压取心井油、气、水饱和度分析，绘制了油水饱和度脱气校正图版。

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Barometer readings are plotted on a pressure chart.

等压线圈上绘出了气压计的读数.

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The determination of throttle coefficient of high-pressure natural gas in adiabatic throttle process is discussed, and the average throttle coefficient can be calculated by the enthalpy-pressure chart and equal enthalpy equation.

讨论了高压天然气绝热节流过程中节流系数的确定。任意状态下的节流系数可利用计算式确定，平均节流系数可利用天然气的焓-压图和等焓计算式确定。

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