Steel Steel: Q195-Q345, S275JR, S375JR, S355JR, GR / T30919 ,, AST1384, 2004, ASTMA53 SCH40 / 80 / STD, BS-PI102555 -2004 Surface Finish: galvanized dipped ຮ້ອນ, galvanized ໄຟຟ້າ, ສີດໍາ, painted, threaded, socket, engraved.ເສັ້ນຜ່າສູນກາງນອກ (...
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