Establish feature-based components graphics library, developed hydraulic system chart editor. Explain the automatic establishment method of hydraulic system contamination control mathematical model.
建立了基于特征的元件图形库，编制了液压系统原理图编辑器，提出了自动生成液压系统污染控制数学模型的方法。
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P LC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。
The filling coefficient theory was put forward, a criterion for the filling coefficient of soil stratum failure and a critical hydraulic gradient chart were formulated.
提出了填充系数理论，制订了土体渗透破坏形式的填充系数判别式和管涌临界破坏坡降计算图。
The filling coefficient theory was put forward, a criterion for the filling coefficient of soil stratum failure and a critical hydraulic gradient chart were formulated.
提出了填充系数理论，制订了土体渗透破坏形式的填充系数判别式和管涌临界破坏坡降计算图。
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