|
Generally speaking, the invention of technology is the materialization of scientific knowledge and experiential knowledge, so that the theory and knowledge which can be applied can be realized. The development of modern technology and the guidance of scientific theory have become the "application of science" to a great extent. However, the development of modern science is also inseparable from technology, which often becomes the aim of scientific research, and the development of technology provides the necessary technical means for scientific research. There is a relationship between them, mutual promotion and mutual restraint. Predictably, their connections will become more intimate and boundaries will blur
The rapid development of air filters is closely related to the development of military industry and electronic industry. In the first world war, the use of various chemical agents, asbestos fibre filter paper as the smoke filter layer of military gas masks came into being. The glass fiber filter medium is used in air filtration to obtain a patent in the United States in October 1940. In the 1950s, the United States studied the production process of glass fiber filter paper, and the air filter was improved and developed. In the 1960s, HEPA filters came out; In the 1970s, the filter paper of fine glass fiber was used as the HEPA filter of filter medium, and the filtration efficiency of particle size of 013 micron particle diameter was 99.9998%. Since the eighty s, with the emergence of new test method, use evaluation to improve and to improve the filtering performance requirements, found the HEPA filter there is a serious problem, and he had a higher ULPA filter performance. Countries are still working on it and expect more advanced air filters soon
The fetus needs to have sufficient strength and elasticity to withstand the shock and impact of the tire, and bear the radial, lateral, and circumferential deformation caused by the tyre in the driving. The fetal body is composed of a layer or a layer of rubber curtain, which can make the fetus and the whole tyre have the necessary strength
Toyota/Lexus T605 Code Scanner - Toyota/Lexus T605 Code Scanner
An independent agency has identified some threats for the security of cloud computing in 2013. These threats have become essential as challenges for PC security gets more and more serious day-by-day that can destroy data and programs stored on your PC. So you are recommended to first view the threats of cloud technology before deploying this new and modern strategy for computing.
New Car Buying Tips--
powerful electric heaters
hydro electric power for kids
american electric power
electrically assisted power steering
powerful electric bikes
Copyright ?1998-2017 Technews Corp, All rights reserved
|
