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◎ CARBON STEEL TUBES AVAILABLE SIZE RANGE ◎ WELDED STEEL PIPE FOR LOW PRESSURE USE ◎ AMERICAN SOCIETY FOR TESTING AND MATERIALS FOR STEEL PIPE ORDINARY USE ◎ RIGID STEEL CONDUIT ◎ CARBON STEEL TUBES FOR MACHINE STRUCTURAL PURPOSES ◎ CARBON STEEL SQUARE PIPE FOR GENERAL STRUCTURAL PURPOSE ◎ ELECTRIC RESISTANCE WELDED CARBON STEEL TUBES FOR AUTOMOBILE STRUCTURAL PURPOSES |
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