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the study of nonmetallic matter under suitable microscopes to determine the structural composition, mittemetalliliste ainete mikroskoopiline uurimine nende struktuuri ja koostise määramiseks
petrographic examination . Materjalitehnika terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mtr/petrographic%20examination/1/eng (20.06.2026)
