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#Mon Aug 09 12:00:46 CEST 2010
Text__2xGLcKOcEd-WfYQ0GneCwQ_text=<p>Cathode rays are invisible in vacuum tubes, but generate a green glow when they strike the glass. The metal cross throws a cross-shaped shadow on the glass.</p>
Text__2xGLcKOcEd-WfYQ0GneCwQ_title=Cathode Ray Tube with Maltese Cross