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Spring Prestressed Concrete Wire Strand 6mm 9mm 12mm High Strength Low Relaxation 1570MPa 1770MPa Plain Spiral Ribbed PC Wire, Find Details and Price about PC Strand Construction Material from Spring Prestressed Concrete Wire Strand 6mm 9mm 12mm High Strength Low Relaxation 1570MPa 1770MPa Plain Spiral Ribbed PC Wire - Tianjin Wasungen Metal Products Co., Ltd.