The article analyzes problems derived from the course of cultivating teachers who assiduously study the secondary vocational master degree and points out its trend of slack process?adult-education form?undergraduate-level.

Fluid kinetics study on jig washer bed dilation and stratification;

The features and proportions of slurry and effect of borehole wall protection in different loose strata were mainly introduced.

This paper introduces a new wall protection method for drilling loose strata casing pipe wall protection.

Effect of loose additive on SSP production and product quality;

Improvement of Strip Loosening Device in Cylinder Conditioner;