... a more scientific and advanced technology, can be used on big construction building like factory, workshop, warehouse and public ... construction project.High toughness, aging resistance, can use on Power Siphon rainwater drainage system50 years LifeAccording to different requirement ... of project, can use different power pipeline(pn3.2, pn4,pn6,pn8,pn10,pn12,pn16, ...