Chelik darajasi: Q195–Q345, S235JR, GR.BD, STK500 Standart: GB/T3091–2001, BS1387–1985, DIN EN 10025, EN10219, JIS G3444:2004, ASTM A53 SCH40/80/STD, BS–EN10255–2004 Yuzaki pardozlash: oldindan galvanizli, tishli, rozetka, o'yilgan, bo'yalgan Tashqi diametri (dyuym): 1/2''—4'' Qalinligi...
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