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Po’lat quvur (o’ralgan po’lat): payvand chokini termal mustahkamlash bilan to'g'ri tikuvli elektr payvandlangan St. 20, tashqi diametri 219,0 m, devor qalinligi 5,0 mm — MXIK (IKPU) kodi 07306001005003041 · Tasnif by Krafta