| 摘要 |
PROBLEM TO BE SOLVED: To provide a cleaning method of an electron gun for a cathode-ray tube, which can completely clean and remove organic pollutants sticking to the electron gun. SOLUTION: In this cleaning method of an electron gun for a cathode-ray tube, an electrode group except the cathode of the electron gun 3 is cleaned by polymethylene oxide, preferably tetramethylene oxide 2 as a detergent. The detergent may not include a stabilizer. The cleaning may be implemented in an oxidation preventing gas.
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