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Daqiang Hollow- Core Slab Used 1860mpa 7 Wire Low Relaxation 0.62''/15.7mm PC Steel Wire Strand Bs-5896 in Steel Structure, Find Details and Price about Pc Strand 7-Wire Pc Wire Strand from Daqiang Hollow- Core Slab Used 1860mpa 7 Wire Low Relaxation 0.62''/15.7mm PC Steel Wire Strand Bs-5896 in Steel Structure - Tianjin Qiangbang Industrial Co., Ltd.