венозний клапан . EKI Combined Dictionary 2026. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif/dlall/eki/%D0%B2%D0%B5%D0%BD%D0%BE%D0%B7%D0%BD%D0%B8%D0%B9%20%D0%BA%D0%BB%D0%B0%D0%BF%D0%B0%D0%BD/1/ukr (21.06.2026)
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