NB/T 47023  法兰 T 1200-2.5–†—Ю–Т¬їX@b4@41-4–†“Э–Ґ“Ы–Ґ”Ш–†вАЩ–°“їR–†“Э–Ґ“Ы–Ґ”ШRFF20 RF00 Sh40RJfFF Sch89F&06RF1@–†“Э–Ґ“Ы–Ґ�