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keraamilisest materjalist kolmnurkne püramiid, mis teatud temperatuuril pehmeneb ja vajub kokku, small, slender, three-sided pyramid composed of oxide mixtures that deform at known temperatures; used to indicate the thermal history of the fired ware
püromeetriakoonus . Materjalitehnika terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mtr/p%C3%BCromeetriakoonus/1/est (29.07.2026)