Assertion: gun's use | /r/AtLocation | cathode ray tubes
Facets:
Source sentences:
text: The largest use is in cathode ray tubes (CRTs), used in nearly all television sets, computer displays and oscilloscopes that are not flat-panel displays.
text: The most common use of electron guns is in cathode ray tubes, which were widely used in computer and television monitors until flat-screen displays rendered them obsolete.