Elbow draft-tubes are widely used in largeand medium-sized hydropower stations in many countries.During the application,handling the somatotype of elbow tubes h
Research situation of eco-design is analyzed,and then thoughts and methods of eco-design are discused.The eco-design includes packaging modularization,demateria
Based on the necessity of three dimensional modeling with computer in teaching reform,this paper is the summarization of reform practice of teaching engineering drawing in our institute.The teaching r