Practice at Yan er gully in Yan an shows that establishing undercurrent interception engineering, leading water to hill and developing slope land orchard and vegetable micro irrigation at protected land is an important model to effective water resources use, and whi.

The investigation on the current situation or some underflow-catching engineering in Fuxin county of Laoning province,some major problems have heen summarized up.

First of all,external skeletal compression fixation for two ends of bone defect of tibia was made by a self-made“external fixer”secondly,closed fracture at the metaphysis was made by a self-made“needle saw”thirdly,the same“external fixer”was adopted to elongate the fractured bone.

Application of polyethylene-waved composite geo-membrane in seep-interception engineering;

Research on stability of riprap influenced by boundary of riverbed during river closure;

Diversion and closure design of Hongjiadu Hydropower Station;

Study on Measures of Reducing the Difficulty of River Closure;