It introduced the path of detaining, choosing of gastric tube, depth of tube detaining, and the way of tube detaining which including tube detaining for conscious, coma patients and for difficulty in insertion patients as well.

Clinical study on colon dialysis time and depth of cannula for hepatic cirrhosis patients with intractable ascites;

Experiment be taken, the result suggest that this seeping-pipe layer meet the designing demand ,the work velocity is smoothly and the machine can fulfile the job of laying the seeping-pipe in greenhouse, but the ditch depth is not equality, the ditch line is not straightforward, thus, the structure of the machine should be improved.

Through the laboratory research and field experiment,the influencing mechanisms of lateral depth in non-pressure irrigation on soil water movement and crop growth are studied.

Under subsurface drip irrigation condition, the experiment was carried out, on the effect of lateral depth on the root and seedling growth of winter wheat in different growing stages.