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Jyutping zung3 bo1
Pinyin zōng bō

Definitions (Wiktionary)
  1. noun
    longitudinal wave

[-]

Jyutping zung3 bo1
Pinyin zòng bō

Definitions (CC-CEDICT)
  1. longitudinal wave
Definitions (Wiktionary)
  1. noun
    longitudinal wave