NOT KNOWN DETAILS ABOUT EDGETECH INDUSTRIES (ETI)

X-ray tubes developed from experimental Crookes tubes with which X-rays ended up first learned on November eight, 1895, from the German physicist Wilhelm Conrad Röntgen. The 1st-technology cold cathode or Crookes X-ray tubes had been utilised until the 1920s. These tubes operate by ionisation of residual fuel throughout the tube. The positive ions