... .(mm):12.0;15.0;15.24;15.70 2*P.C. wire bunch Dia(mm):12.0;15.0(7 ... grouting, convenient construction, material-saving, bended easily, etc. 1) unbonded P.C.strand Nor.Dia.(mm):Φ12.0;Φ 15.0;Φ15 ... .24;Φ15.702) unbonded P.C. wire bunch Nor. Dia(mm):Φ12.0;Φ15.0 ...