电子管 (diàn zǐ guǎn) — electron tube, vacuum tube, valve

Definition

A vacuum-sealed glass tube that controls electron flow, used as the core component in early radios, TVs, and amplifiers before transistors replaced it. Largely obsolete now except in high-end audio and some specialized equipment.

noun

electron tubevacuum tubevalve

Measure word · 只

Examples

电子管。
Lǎo shì de shōu yīn jī lǐ yǒu hěn duō diàn zǐ guǎn.
Old-fashioned radios have many vacuum tubes.
电子管。
Zhè zhǒng diàn zǐ guǎn xiàn zài yǐ jīng hěn shǎo yòng le.
This type of electron tube is rarely used now.
电子管。
diàn zǐ guǎn Shì zǎo qī diàn zǐ shè bèi de hé xīn bù jiàn.
Electron tubes were core components of early electronic devices.

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