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Qo’shtavr (qo’shtavrli balka): Parallel gardish qirralari bo'lgan I-nurli № 70B0, 70B1, 70B2 markali St3sp/ps5, St3Gsp/ps, boshqa karbonli po'lat S235-S285 — MXIK (IKPU) kodi 07216001004000155 · Tasnif by Krafta