... .0335.79X,G,S0.50012.70EU,IEU Through the ISO9001 quality management system certification and in the process of accreditation API ,American ... your concrete partner.Pls feel relieved to us, our high quality pipes and considerate service.. We have been in your service ... your concrete partner.Pls feel relieved to us, our high quality pipes and considerate service. Should any of the item be ...