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особо чистый материалstresses
phys. ultra pure material (MichaelBurov); ultra-pure material (MichaelBurov); ultrapure material (MichaelBurov); extra pure material (MichaelBurov); high purity material (MichaelBurov)
sol.pow. high-purity material
особо чистый материал: 4 phrases in 2 subjects
Chemical industry1
Physics3