Establish feature-based components graphics library, developed hydraulic system chart editor. Explain the automatic establishment method of hydraulic system contamination control mathematical model.

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.

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.