... , pipe machinery, pipe machine, corrugated pipe line, pipe line, corrugated pipe extruder, spiral pipe extruder, corrugated pipe machinery, corrugated pipe machine, double wall corrugated pipe line, double ... corrugated pipe extruder, corrugated pipe extrusion line, xps line, xps, xps machinery, plastic extruder, corrugator, plastic extrusion line, foaming sheet extruder, foaming board ...