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non-return valve that is operated by flow, tagasivoolu takistav klapp, mida reguleeritakse voolu abil
tagasivooluklapp . Sisearhitektuuri terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//sarh/tagasivooluklapp/1/est (13.07.2026)
