With the coming of energy crisis and the environment growing worse, every country is paying more attention to the research of Eco-technical measures.

Through analyzing and comparing the design technique conditions of air-conditioning and ventilation systems of domestic and foreign surface naval ships,this paper provides some aspects that still need to be improved,the solution approaches,the goal of optimized design,and development prospect for air-conditioning and ventilation systems of domestic surface naval ships.

The 3-dimensional design technique can realize coordinated design ofmultiple specialties, database common share, which supports that computerization and network can be realized for the information transmission between departments of design, purchase, engineering construction and engineering cost control.

Design techniques of hit-ponit on target for guided missile are introduced, and three kinds of guided missile are discussed as working examples.

The usage of CAI software s designing technology will have an impact on the CAI software s quality.

The article inquires into the changes of designing technology of political system in the West on basis of the unity of history and logic .

In order to demolish gymnasium of liaoning province palaestra successfully,in view of its unusual structure,especially its roof is close steel net structure which is more than 550 tons and demolition is very difficult,so subsection collapse blasting is adopted,and technology design consists of blasting pretreatment,blasting network and blasting safety test.