| 21. | Cathode rays were discovered by Johann Hittorf in 1869 in primitive Crookes tubes.
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| 22. | The lead in the cathode ray tube of a monitor is especially dangerous.
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| 23. | Video Display also manufactures and distributes cathode ray tubes for video display terminals.
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| 24. | The design requires cathode ray monitors to be deep and heavy.
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| 25. | I think this is the end of the cathode ray tube,
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| 26. | The tube resembled a small cathode ray tube ( CRT ).
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| 27. | The zero point would be displayed on the cathode ray tube.
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| 28. | They are lighter than the conventional cathode ray tube monitor.
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| 29. | The Igniscope used a cathode ray tube, giving an entirely visual method of diagnosis.
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| 30. | Hitachi Ltd . announced last month that it would stop manufacturing cathode ray tubes.
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