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Angielski techniczny
chemical compound, trace amounts, boundary, untreated, labolatory dryer, digestion, scarce, separating funnel, worldwide problem, diverse, primary sources, magnetic stirrer, suspended solids, conical flask/ erlenimaer flask, various , trace, build up, exhaust, contain, to discharge, separation, respiratory allergies, dilute, a source, persist, infectious disease, to suffocate, damaging, a lavatory, crystallizer, sense, beaker