... a high-tech chemical and low relaxation prestressed concrete steel strand enterprise integrated with R&D, manufacturing and foreign trade, specialized ... ,98.777515.2140110115.24 ,140110215.7 150117817.8 ,191150021.62852237Unbonded prestressing steel strandPolyethylene grease coating1*712.5+0.40-0.2092 ... .777515.2140110115.24140110215.71501178 High Tensile Galvanized 7 Wire Steel Strand