Chelik darajasi: Q195–Q345, S235JR, S275JR, S355JR, GR.BD, STK500 Standart: GB/T3091–2001, BS1387–1985, DIN EN10025, EN10219, JIS G34444:20 SCH40/80/STD, BS-EN10255-2004 Yuzaki pardozlash: issiq daldırma galvanizli, elektrogalvanizli, qora, bo'yalgan, tishli, rozetka, o'yilgan. Tashqi diametri (i...
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