1. sulatusahju või koppa sisseviidav vedelat räbu moodustav materjal, mille ülesandeks on kahjulike lisandite eemaldamine sulametallist; 2. keevitamisel, termolõikamisel ja jootmisel materjal mis välistab oksiidide jt ebasoovitavate produktide moodustumist või soodustab nende eemaldamist
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Räbustit kasutatakse samuti kattekihina mõnede sulas olekus metallivannide kaitsmiseks.
1. in metal refining, a material added to a melt to remove undesirable substances, while fluxing the melt facilitates the agglomeration and separation of such undesirable constituents from the melt 2. in brazing, cutting, soldering, or welding, material used to prevent the formation of, or to dissolve and facilitate removal of, oxides and other undesirable substances
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It is also used as a protective covering for certain molten metal baths.
