The disadvantages of conventional design of cyclone separator with downward exhaust gas are analyzed.

It concluded that the best exhaust mode for the main engine of military speedcraft is underwater exhaust system.

It was also revealed that both the length of the exit tube and that of the dipleg brought little fluctuation of pressure drop in the separator,but exerted a distinct influence on downward flux distribution of the two outlets.

Effects of water management strategies on soil water-salt movement and subsurface drainage;

Field evaluation of DRAINMOD-N model for surface runoff subsurface drainage and nitrogen loss;

A large-scale subsurface drainage research project, RAJAD (Rajasthan Agricultural Drainage Research Project), was implemented in Rajasthan, India to combat the soil salinity induced by irrigation operation.

Dynamic effect of underground drainage on stability of landslide;

Design of underground drainage and effect verification for high side slope of Sanxia navigation lock;

Then eight underground drainage plans of the landslide are simulated in terms of the analyzing and computing of the geo-slope,and thus the preferred plan is that the position of the underground dry well and drainage gallery is arranged in the Front-middle part of the Dashiban landslide for draining water effect and efficient.