来自MSN15 天
'World's Darkest Skies' Under Threat From New Industrial Plant
World's Darkest Skies' Under Threat From New Industrial Plant.The world's darkest skies are under threat from an industrial megaproject that could permanently hamper our knowledge of the heavens. The ...
IEEE27 天
240/416-Volt 3-phase 4-wire power and lighting supply for modern industrial plants
Abstract: Recently, in the technical magazines, articles have appeared advocating the use of a 277/480-volt 3-phase 4-wire grounded neutral distribution system for manufacturing plants. In these ...