This article introduced the general technical level of the universal metal-enclosed switchgear at home and abroad (also called breaker cubicle or HV cubicle switchboard), the structure and features of present products, the self-design and technique introduction of domestic products and the future prospect of product development
The high-power low-speed,medium-speed,high-speed overseas marine diesel engines whose cylinder diameter is over 160mm and the power is over 1000kW are elaborated on three aspects,which is the general technical level,the general situation of technology development and the trend of development in the future. Especially improving their reliability,part-load characteristic and exhaust emission over the years.
This paper describes the whole process of technological design of machining flexible production line for motorcycle engine in terms of technological design consideration of flexible production line,guiding ideology,main design contents as well as overall technological level of production line and experiences.
So study how to combine shield method with shallow undercutting method in subway station construction, which’s greatly important for improving the general technology level in the field of tunnel and underground engineering.
However, unlike the circumstance of 1980's,at present, the central purpose of utilization of FDI is to utilize it's advanced technology to enhance the whole level of our industrial technology.
In this paper, the contents and recent progress of a newly developing technique—Process Energy Synthesis and Optimization based on many new cross subjects such as The Second Law Analysis, Exergo-Economics, and Process Engineering etc. was briefly reviewed. It has been pointed out that this technique has significant effect on energy saving and enhancement of economic benefit for the ethylene plant through optimization synthesis of flow sheet and energy use under certain conditions of process and equipment.
It gives the introduction and comments on current situation of nondestructive test in petroleum engineering construction. And then it analyzes the developing tendency in next years and presents the proposal.
The growth of oil geophysical prospecting in China can be marked off in 2 stages as of the 1970s. What we have accomplished during its preceding stage should include:with the technical assistance of the former Soviet Union, a framework of oil geophysical exploration has been set up on the basis of self-reliance; and we could assure ourselves of applying techniques to the best of advantage, which did have contributed significantly to the success in the discovery of the major oil/gas fields in China. And at t...