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blue stain (aka sap stain) is caused by a fungus that under certain conditions will spread into wood once it is removed from the stump, sinine plekk, mis on põhjustatud seenest, mis teatud tingimustel levib puitu, kui see kännult eemaldatakse
puidusisene sinavus . Metroloogia terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mea/puidusisene%20sinavus/1/est (20.06.2026)
