電子管 [电－－]

Jyutping din6 zi2 gun2
Pinyin diàn zǐ guǎn

Definitions (CC-CEDICT)
  1. valve (electronics)
  2. vacuum tube
Definitions (Wiktionary)
  1. noun
    vacuum tube; electron tube
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）