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spiral pipe SSAW 219~2500mm diameter 3PE surface treatment
spiral pipe SSAW 219~2500mm diameter,made of different grade of steel, for different purpose--water,gas,oil or piling, could be different surface treatment.
spiral pipe SSAW 219~2500mm diameter,made of different grade of steel, for different purpose--water,gas,oil or piling, could be different surface treatment.
