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METHOD FOR MANUFACTURING A CORRECTION MASK FOR AN IMAGE INTENSIFIER TUBE OF THE PROXIMITY-FOCUS TYPE HAVING AN OBLONG CATHODE AND ANODE,AND ALSO A METHOD FOR CORRECTING AN IMAGE INTENSIFIER TUBE
METHOD FOR MANUFACTURING A CORRECTION MASK FOR AN IMAGE INTENSIFIER TUBE OF THE PROXIMITY-FOCUS TYPE HAVING AN OBLONG CATHODE AND ANODE,AND ALSO A METHOD FOR CORRECTING AN IMAGE INTENSIFIER TUBE