Steel Pipe, Steel Tube, Welded Steel Pipe manufacturer / supplier in China, offering As1163 Standard of Black Square Tube/ Rectangular Square Tube for Construction Building Material, En10219 Standard of Hot DIP Galvanized Hollow Section/ Hot DIP Galvanized Square Pipe/ Hot DIP Galvanized Rectangular Pipe, Hot DIP Galvanized Steel Round Pipe Used for Water Supply and so on.
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