The notions of pre-cotopology,pre-closure operator,family of pre-outside-derived operators,pre-interior operator,family of covers,and their orders on a given complete lattice are introduced,and the way to determine pre-cotopologies on a complete lattice is studied.

The method of equipment transformation of easy-pulled bottle cap;

The design of the multi_position progressive die for the easy_pulling lids was introduced from the aspects of the forming process, the stock layout, the die structure and the design of the main parts of the die.

The Application of Remote Sensing Information to Dividing Grades of Land Resources and Evaluation of Land Quality in the Developmental Area of Wulagai;

Through using the high technological of RS and GIS, combined outside investigation, the chart of use conditions was edited, date base of land resources was set up and grasped the land use conditions rapidly, accurately, instantly, the comprehensive analysis of use conditions of land resources in the developmental area ofWulagai has provided.