Sonar
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Sonar (ùi Eng-gí "sound navigation and ranging" lâi--ê) sī 1 chióng lī-iōng siaⁿ-im (sound) tī chúi--nih thoân-pò ê ki-su̍t, ēng lâi kiâⁿ-chûn (navigation) iah sī cheng-chhek pa̍t chiah chûn-chiah. Sonar ū chú-tōng kap pī-tōng 2 chióng.
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