Engraving depicting Edison's electromagnetic ore sorter. Particles of ore are placed in hopper at the top. As they fall past the box enclosing an...
Sembcorp Industries Ltd. Engineer inspects the ultraviolet disinfection pipes, used in the treatment of recycled water, in the newly opened Sembcorp...
Sembcorp Industries Ltd. Engineer inspects the ultraviolet disinfection pipes, used in the treatment of recycled water, in the newly opened Sembcorp...新加坡
In this handout from NASA, a full-disk multiwavelength extreme ultraviolet image of the sun taken NASA's Solar Dynamics Observatory is seen MArch 30,...
Wilhelm Conrad Roentgen, 1845 - 1923, a German mechanical engineer and physicist, who, on 8 November 1895, produced and detected electromagnetic...