(a) a tube holding a sample to be used as a standard in an experiment, to which samples for testing are compared; (b) a cold-cathode gas-filled tube…
单词 | θ78523 |
释义 | the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > cathode-ray tube > [noun] > operating at ambient temperature (2) reference tube1890 (a) a tube holding a sample to be used as a standard in an experiment, to which samples for testing are compared; (b) a cold-cathode gas-filled tube… cold-cathode1929 a cathode that emits electrons at ambient temperature under the influence of a high voltage; usually attributive. |
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