hot today. Several important factors have come together around the same time. One is the advances in ultra-high frequency RFID systems. UHF systems are able to deliver the read range needed for supply chain applications, such as scanning tags on products as pallets are moved through a dock door or scanning cases on a high shelf in a warehouse.
Another factor was the efforts by the Auto-ID Cent
2000 B.C - The first recorded (The Susruta Samhita, Sanskrit writing) water purification began with the Egyptians. It is said that impure water should be boiled over a fire, heated in the sun, have a hot iron dipped into it or purified by filtration through sand and course gravel.
A major step in the development of desalination technologies came in the 1940s during World War II when various m
급탕(온수) 설비는 사용량에 따라 여러 종류가 있으나 물탱크가 없고 최소의 공간에 설치할 수 있는 전기 순간 온수기와 가스 순간 온수기가 가장 간편하다. 순간 온수기는 안전하고 경제적이며 내구성이 뛰어나고 위생적인데다 기능이 다양해 경제성과 편의성을 모두 만족시킬 수 있다. 다만 전기용량
system which utilizes the energy efficiently and cleanly, worring the climate change and the exhaustion of fossil fuels, starting from securing energy resources which are indispensable for economic development and growth via the secure supply of the energy
Flow
New cognition of environment and energy
problem
competition instruction
in energy
industry
Energy supply-centered is changed