juːnˈiːk tɛknˈɑːlədʒi wʌz jˈuːzd ɪn kənstɹˈʌktɪŋ ðə tˈʌnəl ˌʌndɚ ðə ɹˈɪvɚ vˌiːˈɛltˈɑːvə: ðə kˈɑːŋkɹiːt tˈʌnəl tˈuːbz wɜː mˌeɪd ɪn ɐ dɹˈaɪ dˈɑːk ɔnðə ʃˈoːɹ, ðə ɹˈɪvɚbˌɛd wʌz ˈɛkskəvˌeɪɾᵻd ænd ðə tˈuːbz wɜː ðˈɛn lˈeɪd dˌaʊn ˌɪntʊ ðə pˈɪts.
Unique technology was used in constructing the tunnel under the river Vltava: The concrete tunnel tubes were made in a dry dock on the shore, the riverbed was excavated and the tubes were then laid down into the pits.