Plastic Pipe Machine, Plastic Extrusion Machine, Pipe Extrusion Machine manufacturer / supplier in China, offering Ducts Customized Meet Specific Project Requirements Supplied with Complete Coupling and Sealing Accessories Available in Various Diameters and Wall Thickness, Ducts Designed to Optimize Post-Tensioning Efficiency Lifespan Widely Used in Bridges High-Rise Buildings Highways Plastic Machinery Extruder Machine, High-Density Polyethylene (HDPE) Duct Meets International Standards for Corrosion Resistance and Long-Term Structural Integrity Plastic Machinery Extruder and so on.