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单词 reference tube
释义

Definition of reference tube in English:

reference tube

noun

  • 1A tube holding a sample to be used as a standard in an experiment, to which samples for testing are compared.

  • 2Electricity a cold-cathode gas-filled tube which can maintain an accurately fixed voltage across itself for long periods.

Origin

Late 19th century; earliest use found in Nature: a weekly journal of science.

Definition of reference tube in US English:

reference tube

noun

  • 1A tube holding a sample to be used as a standard in an experiment, to which samples for testing are compared.

  • 2Electricity a cold-cathode gas-filled tube which can maintain an accurately fixed voltage across itself for long periods.

Origin

Late 19th century; earliest use found in Nature: a weekly journal of science.
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更新时间：2025/6/19 9:37:29