单词 | hard tube |
释义 | > as lemmashard tube hard tube n. Electronics a discharge tube with a hard vacuum, or evacuated sufficiently for any remaining gas not to affect its performance; cf. sense A. 25. ΚΠ 1898 Science 22 Apr. 565/1 The same body has different transparencies with different tubes, ‘soft tubes’ being those requiring a small potential and ‘hard tubes’ those requiring a high one. 1947 J. V. Lebacqz & M. G. White in L. N. Ridenour Radar Syst. Engin. x. 373 Successful hard-tube pulsers have been made with power outputs up to 3 or 4 Mw. 2012 Appl. Surface Sci. 258 9565/2 The negative voltage with two different amplitudes of 3 kV and 10 kV was provided by a hard tube (HT) pulser and applied to the sample holder. < as lemmas |
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