губчатый . EKI Combined Dictionary 2026. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif/dlall/eki/%D0%B3%D1%83%D0%B1%D1%87%D0%B0%D1%82%D1%8B%D0%B9/1/rus (19.06.2026)
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губчатый . Materjalitehnika terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mtr/%D0%B3%D1%83%D0%B1%D1%87%D0%B0%D1%82%D1%8B%D0%B9/1/rus (19.06.2026)