ເກຣດເຫຼັກ: Q195–Q345,S235JR,S275JR,S355JR,GR.BD, STK500 ມາດຕະຖານ:GB/T3091–2001,BS1387–1985,DIN EN10025,EN10219,JIS G34401040,200 5 -2004 Surface Finish: galvanized dipped ຮ້ອນ, galvanized ໄຟຟ້າ, ສີດໍາ, painted, threaded, socket, engraved. ເສັ້ນຜ່າສູນກາງນອກ (...
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