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单词 gas-focused
释义

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gas-focused
gas-focused adj. Electronics (now chiefly historical) (of a cathode ray tube) focusing the electron beam by means of positive ions produced in a residual gas.
ΚΠ
1932 Jrnl. Inst. Electr. Engineers 71 57 (title) Accuracy of measurements made with hot-filament cathode-ray tubes of the gas-focused type.
1959 J. F. Rider & F. D. Uslan Encycl. Cathode-Ray Oscilloscopes (ed. 2) i. 11/1 The Western Electric 224, a gas-focused type of tube.
1995 A. Abramson Zworykin vi. 74 A tremendous advance over the Western Electric gas-focused tube that had dominated the oscillograph field.
extracted from gasn.1adj.
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