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METHOD OF DETERMINING VARIATIONS IN THE PREVIOSLY ADJUSTEDNOMINAL DISTANCE BETWEEN THE FACING SURFACES OF A COLOUR SELECTION ELECTRODE AND A DISPLAY WINDOW OF A COLOUR TELEVISION DISPLAY TUBE AND DEVICE FOR CARRYING OUT THE METHOD
METHOD OF DETERMINING VARIATIONS IN THE PREVIOSLY ADJUSTEDNOMINAL DISTANCE BETWEEN THE FACING SURFACES OF A COLOUR SELECTION ELECTRODE AND A DISPLAY WINDOW OF A COLOUR TELEVISION DISPLAY TUBE AND DEVICE FOR CARRYING OUT THE METHOD
