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Jyutping gwong1 dou6 cim1 wai4
Pinyin guāng dǎo xiān wéi

Definitions (CC-CEDICT)
  1. optical fiber
Definitions (Wiktionary)
  1. noun
    optical fibre
    (syn.) 光纖, 光纤
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)