ເກຣດເຫຼັກ: Q195–Q345,S235JR,GR.BD,STK500 ມາດຕະຖານ:GB/T3091–2001,BS1387–1985, DIN EN 10025,EN10219,JIS G3444:2004, ASTM A53 SCH40/80/STD, BS–EN10255–2004 Surface Finish: pre galvanized, threaded, socket, engraved, painted, ເສັ້ນຜ່າສູນກາງນອກ (ນິ້ວ): 1/2''-4'' ຄວາມຫນາ ...
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